Globally rename the header inclusion guard names.

Consistently apply this rule: the guard name is obtained from the
filename by stripping the leading "lib", converting '/' and '.'  to
'_' and uppercasing the resulting name. Guard names in the root
directory have to be prefixed by "FFMPEG_".

Originally committed as revision 15120 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/rtspcodes.h

@@ -19,8 +19,8 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#ifndef FFMPEG_RTSPCODES_H
-#define FFMPEG_RTSPCODES_H
+#ifndef AVFORMAT_RTSPCODES_H
+#define AVFORMAT_RTSPCODES_H
 
 /** RTSP handling */
 enum RTSPStatusCode {
@@ -37,4 +37,4 @@ RTSP_STATUS_SERVICE         =503, /**< Service Unavailable */
 RTSP_STATUS_VERSION         =505, /**< RTSP Version not supported */
 };
 
-#endif /* FFMPEG_RTSPCODES_H */
+#endif /* AVFORMAT_RTSPCODES_H */