doc: switch github urls to https

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

doc/platform.texi

@@ -52,14 +52,14 @@ unacelerated code.
 
 Mac OS X on PowerPC or ARM (iPhone) requires a preprocessor from
 @url{https://github.com/FFmpeg/gas-preprocessor} or
-@url{http://github.com/yuvi/gas-preprocessor} to build the optimized
+@url{https://github.com/yuvi/gas-preprocessor} to build the optimized
 assembler functions. Put the Perl script somewhere
 in your PATH, FFmpeg's configure will pick it up automatically.
 
 Mac OS X on amd64 and x86 requires @command{yasm} to build most of the
 optimized assembler functions. @uref{http://www.finkproject.org/, Fink},
 @uref{http://www.gentoo.org/proj/en/gentoo-alt/prefix/bootstrap-macos.xml, Gentoo Prefix},
-@uref{http://mxcl.github.com/homebrew/, Homebrew}
+@uref{https://mxcl.github.com/homebrew/, Homebrew}
 or @uref{http://www.macports.org, MacPorts} can easily provide it.
 
 

doc/protocols.texi

@@ -691,7 +691,7 @@ data transferred over RDT).
 
 The muxer can be used to send a stream using RTSP ANNOUNCE to a server
 supporting it (currently Darwin Streaming Server and Mischa Spiegelmock's
-@uref{http://github.com/revmischa/rtsp-server, RTSP server}).
+@uref{https://github.com/revmischa/rtsp-server, RTSP server}).
 
 The required syntax for a RTSP url is:
 @example