Globally rename the header inclusion guard names.
Consistently apply this rule: the guard name is obtained from thefilename by stripping the leading "lib", converting '/' and '.' to'_' and uppercasing the resulting name. Guard names in the rootdirectory have to be prefixed by "FFMPEG_"....
Add FFMPEG_ prefix to all multiple inclusion guards.
Originally committed as revision 10765 to svn://svn.ffmpeg.org/ffmpeg/trunk
Use filename as multiple inclusion guard.
Originally committed as revision 10760 to svn://svn.ffmpeg.org/ffmpeg/trunk
Implement av_strlcatf(): a strlcat which adds a printf style formatted string
Originally committed as revision 9753 to svn://svn.ffmpeg.org/ffmpeg/trunk
add some string functions
Originally committed as revision 9400 to svn://svn.ffmpeg.org/ffmpeg/trunk