; Prefer HTTPS to HTTP in docs

; Prefer HTTPS to HTTP in docs

* doc/emacs/android.texi (Android Software):
* doc/lispref/frames.texi (X Selections):
* doc/misc/cc-mode.texi (Custom Filling and Breaking):
* doc/misc/efaq.texi (Basic editing):
* doc/misc/gnus.texi (Propagating marks, Spam Statistics Package):
* doc/misc/org.org (External Links, Images in HTML export)
(LaTeX Export, LaTeX math snippets): Prefer HTTPS to HTTP.  Fix or
mark some broken links while we're at it.