gnu: Use HTTPS for r-project.org home pages.

* gnu/packages/cran.scm (r-performanceanalytics, r-qap, r-gclus, r-leaps)
(r-splus2r, r-ifultools, r-sapa, r-quantmod, r-tseries, r-wmtsa, r-fractal)
(r-urca, r-trend, r-expm, r-complexplus, r-powerplus, r-signal, r-abind)
(r-prroc)[home-page]: Use HTTPS.
* gnu/packages/emacs.scm (emacs-ess)[home-page]: Likewise.
* gnu/packages/graph.scm (r-diffusionmap)[home-page]: Likewise.
* gnu/packages/statistics.scm (r-minimal, r-quantreg)[home-page]: Likewise.

gnu/packages/cran.scm

@@ -1679,7 +1679,7 @@ simplifying cross-class interoperability.")
      `(("r-quadprog" ,r-quadprog)
        ("r-xts" ,r-xts)
        ("r-zoo" ,r-zoo)))
-    (home-page "http://r-forge.r-project.org/projects/returnanalytics/")
+    (home-page "https://r-forge.r-project.org/projects/returnanalytics/")
     (synopsis "Econometric tools for performance and risk analysis")
     (description "This is a collection of econometric functions for
 performance and risk analysis.  This package aims to aid practitioners and
@@ -1996,7 +1996,7 @@ traveling salesman problem).")
          "0d2d1ni1camixyi45lfy00f4pn3p063k7bsi8gj5scp6n15mdgb0"))))
     (build-system r-build-system)
     (native-inputs `(("gfortran" ,gfortran)))
-    (home-page "http://cran.r-project.org/web/packages/qap/")
+    (home-page "https://cran.r-project.org/web/packages/qap/")
     (synopsis "Heuristics for the quadratic assignment problem (QAP)")
     (description "This package implements heuristics for the @dfn{quadratic
 assignment problem} (QAP).  Currently only a simulated annealing heuristic is
@@ -2016,7 +2016,7 @@ available.")
          "02ba6zj9bjwrzykamjp40ajynx9xjx9h2i85n0ym0r5lcki4x6fn"))))
     (build-system r-build-system)
     (propagated-inputs `(("r-cluster" ,r-cluster)))
-    (home-page "http://cran.r-project.org/web/packages/gclus/")
+    (home-page "https://cran.r-project.org/web/packages/gclus/")
     (synopsis "Clustering graphics")
     (description "This package orders panels in scatterplot matrices and
 parallel coordinate displays by some merit index.  It contains various indices
@@ -2355,7 +2355,7 @@ rules with R.")
          "11gjmn1azrjw5xlvdb4gknj9985kck9x8zb9np1rnk2smp6pka2m"))))
     (build-system r-build-system)
     (native-inputs `(("gfortran" ,gfortran)))
-    (home-page "http://cran.r-project.org/web/packages/leaps/")
+    (home-page "https://cran.r-project.org/web/packages/leaps/")
     (synopsis "Regression subset selection")
     (description
      "This package provides tools for regression subset selection, including
@@ -2376,7 +2376,7 @@ exhaustive search.")
     (properties `((upstream-name . "splus2R")))
     (build-system r-build-system)
     (native-inputs `(("gfortran" ,gfortran)))
-    (home-page "http://cran.r-project.org/web/packages/splus2R/")
+    (home-page "https://cran.r-project.org/web/packages/splus2R/")
     (synopsis "Supplemental S-PLUS functionality in R")
     (description
      "Currently there are many functions in S-PLUS that are missing in R.  To
@@ -2399,7 +2399,7 @@ provides some missing S-PLUS functionality in R.")
     (propagated-inputs
      `(("r-mass" ,r-mass)
        ("r-splus2r" ,r-splus2r)))
-    (home-page "http://cran.r-project.org/web/packages/ifultools/")
+    (home-page "https://cran.r-project.org/web/packages/ifultools/")
     (synopsis "Insightful research tools")
     (description "This package provides C code used by the wmtsa, fractal, and
 sapa R packages.")
@@ -2420,7 +2420,7 @@ sapa R packages.")
     (propagated-inputs
      `(("r-ifultools" ,r-ifultools)
        ("r-splus2r" ,r-splus2r)))
-    (home-page "http://cran.r-project.org/web/packages/sapa/")
+    (home-page "https://cran.r-project.org/web/packages/sapa/")
     (synopsis "Spectral analysis for physical applications")
     (description "This package provides software for the book Spectral
 Analysis for Physical Applications, Donald B. Percival and Andrew T. Walden,
@@ -2444,7 +2444,7 @@ Cambridge University Press, 1993.")
        ("r-ttr" ,r-ttr)
        ("r-xts" ,r-xts)
        ("r-zoo" ,r-zoo)))
-    (home-page "http://cran.r-project.org/web/packages/quantmod/")
+    (home-page "https://cran.r-project.org/web/packages/quantmod/")
     (synopsis "Quantitative financial modelling framework")
     (description "This package provides a quantitative financial modelling
 framework to allow users to specify, build, trade, and analyse quantitative
@@ -2469,7 +2469,7 @@ financial trading strategies.")
        ("r-zoo" ,r-zoo)))
     (native-inputs
      `(("gfortran" ,gfortran)))
-    (home-page "http://cran.r-project.org/web/packages/tseries/")
+    (home-page "https://cran.r-project.org/web/packages/tseries/")
     (synopsis "Time series analysis and computational finance")
     (description
      "This package provides functions relating to time series analysis and
@@ -2492,7 +2492,7 @@ computational finance.")
      `(("r-ifultools" ,r-ifultools)
        ("r-mass" ,r-mass)
        ("r-splus2r" ,r-splus2r)))
-    (home-page "http://cran.r-project.org/web/packages/wmtsa/")
+    (home-page "https://cran.r-project.org/web/packages/wmtsa/")
     (synopsis "Wavelet methods for time series analysis")
     (description
      "This package provides software to accompany the book \"Wavelet Methods
@@ -2568,7 +2568,7 @@ multivariate distributions.")
        ("r-scatterplot3d" ,r-scatterplot3d)
        ("r-splus2r" ,r-splus2r)
        ("r-wmtsa" ,r-wmtsa)))
-    (home-page "http://cran.r-project.org/web/packages/fractal/")
+    (home-page "https://cran.r-project.org/web/packages/fractal/")
     (synopsis "Fractal time series modeling and analysis")
     (description
      "This package provides tools for stochastic fractal and deterministic
@@ -2589,7 +2589,7 @@ chaotic time series analysis.")
     (build-system r-build-system)
     (propagated-inputs `(("r-nlme" ,r-nlme)))
     (native-inputs `(("gfortran" ,gfortran)))
-    (home-page "http://cran.r-project.org/web/packages/urca/")
+    (home-page "https://cran.r-project.org/web/packages/urca/")
     (synopsis "Unit root and cointegration tests for time series data")
     (description
      "This package provides unit root and cointegration tests encountered in
@@ -2637,7 +2637,7 @@ interface.")
      `(("r-extradistr" ,r-extradistr)))
     (native-inputs
      `(("gfortran" ,gfortran)))
-    (home-page "http://cran.r-project.org/web/packages/trend/")
+    (home-page "https://cran.r-project.org/web/packages/trend/")
     (synopsis "Non-parametric trend tests and change-point detection")
     (description
      "The analysis of environmental data often requires the detection of
@@ -2666,7 +2666,7 @@ sample Robust Rank-Order Distributional Test.")
     (build-system r-build-system)
     (propagated-inputs `(("r-matrix" ,r-matrix)))
     (native-inputs `(("gfortran" ,gfortran)))
-    (home-page "http://r-forge.r-project.org/projects/expm/")
+    (home-page "https://r-forge.r-project.org/projects/expm/")
     (synopsis "Tools for matrix exponentials and related quantities")
     (description
      "This package provides tools for the computation of the matrix
@@ -2688,7 +2688,7 @@ exponential, logarithm, square root, and related quantities.")
     (propagated-inputs
      `(("r-expm" ,r-expm)
        ("r-matrix" ,r-matrix)))
-    (home-page "http://cran.r-project.org/web/packages/complexplus/")
+    (home-page "https://cran.r-project.org/web/packages/complexplus/")
     (synopsis "Functions of complex or real variables")
     (description
      "This package extends several functions to the complex domain, including
@@ -2759,7 +2759,7 @@ ordered factor data types.")
        ("r-mass" ,r-mass)
        ("r-matrix" ,r-matrix)
        ("r-phontools" ,r-phontools)))
-    (home-page "http://cran.r-project.org/web/packages/powerplus/")
+    (home-page "https://cran.r-project.org/web/packages/powerplus/")
     (synopsis "Exponentiation operations")
     (description
      "This package provides tools for the computation of matrix and scalar
@@ -2966,7 +2966,7 @@ and within plot factors interact.")
     (build-system r-build-system)
     (propagated-inputs `(("r-mass" ,r-mass)))
     (native-inputs `(("gfortran" ,gfortran)))
-    (home-page "http://cran.r-project.org/web/packages/signal/")
+    (home-page "https://cran.r-project.org/web/packages/signal/")
     (synopsis "Signal processing")
     (description
      "This package provides a set of signal processing functions originally
@@ -3075,7 +3075,7 @@ R itself can handle.")
         (base32
          "0b1zd8jbnl6l292cr9rb50m09fy3ylxvzkpgi5lfb1nbzddcwfis"))))
     (build-system r-build-system)
-    (home-page "http://cran.r-project.org/web/packages/abind/")
+    (home-page "https://cran.r-project.org/web/packages/abind/")
     (synopsis "Combine multidimensional arrays")
     (description
      "This package provides tools to combine multidimensional arrays into a
@@ -3098,7 +3098,7 @@ extracting and replacing data in arrays.")
          "03hvh92lq4i4w4mla9bvwrwb4626f4hvlxgdn57hamp70960vjyc"))))
     (properties `((upstream-name . "PRROC")))
     (build-system r-build-system)
-    (home-page "http://cran.r-project.org/web/packages/PRROC/")
+    (home-page "https://cran.r-project.org/web/packages/PRROC/")
     (synopsis "Precision-Recall and ROC curves for weighted and unweighted data")
     (description
      "This package computes the areas under the @dfn{precision-recall} (PR)

gnu/packages/emacs.scm

@@ -3773,7 +3773,7 @@ programming language.")
                                         texlive-latex-seminar
                                         texlive-latex-hyperref
                                         texlive-tex-texinfo)))))
-    (home-page "http://ess.r-project.org/")
+    (home-page "https://ess.r-project.org/")
     (synopsis "Emacs mode for statistical analysis programs")
     (description "Emacs Speaks Statistics (ESS) is an add-on package for GNU
 Emacs.  It is designed to support editing of scripts and interaction with

gnu/packages/graph.scm

@@ -142,7 +142,7 @@ more.")
      `(("r-igraph" ,r-igraph)
        ("r-matrix" ,r-matrix)
        ("r-scatterplot3d" ,r-scatterplot3d)))
-    (home-page "http://www.r-project.org")
+    (home-page "https://www.r-project.org")
     (synopsis "Diffusion map")
     (description "This package implements the diffusion map method of data
 parametrization, including creation and visualization of diffusion maps,

gnu/packages/statistics.scm

@@ -271,7 +271,7 @@ as.POSIXct(if (\"\" != Sys.getenv(\"SOURCE_DATE_EPOCH\")) {\
      (list (search-path-specification
             (variable "R_LIBS_SITE")
             (files (list "site-library/")))))
-    (home-page "http://www.r-project.org/")
+    (home-page "https://www.r-project.org/")
     (synopsis "Environment for statistical computing and graphics")
     (description
      "R is a language and environment for statistical computing and graphics.
@@ -5018,7 +5018,7 @@ using modular prediction and response module classes.")
      `(("r-matrix" ,r-matrix)
        ("r-matrixmodels" ,r-matrixmodels)
        ("r-sparsem" ,r-sparsem)))
-    (home-page "http://www.r-project.org")
+    (home-page "https://www.r-project.org")
     (synopsis "Quantile regression")
     (description
      "This package provides an estimation and inference methods for models