gnu: openldap-for-linphone: Hide it.

We don't want this to show up when searching for "openldap".

* gnu/packages/openldap.scm (openldap-for-linphone): Wrap in HIDDEN-PACKAGE
and add a comment.

gnu/packages/openldap.scm

@@ -113,7 +113,10 @@
     (license openldap2.8)
     (home-page "https://www.openldap.org/")))
 
+;; This is an incompatible fork of openldap that adds types needed for
+;; liblinphone.
 (define-public openldap-for-linphone
+  (hidden-package
    (package
      (inherit openldap)
      (name "openldap")
@@ -126,7 +129,7 @@
                (file-name (git-file-name name version))
                (sha256
                 (base32
-                "1yd3cnngr5z3nymnml8fynspxgdzap7y7glp601nbkdj67wyg0k8"))))))
+                 "1yd3cnngr5z3nymnml8fynspxgdzap7y7glp601nbkdj67wyg0k8")))))))
 
 (define-public nss-pam-ldapd
   (package