ffmpeg: fix ffserver.conf path, include docs

* Patch the hard-coded /etc/ffserver.conf path and declare it as
  global writable file.
* Build the documentation.
* Also include ffserver.conf as a documentation file. It requires
  editing, so we can't include it as a default settings file.

media-video/ffmpeg/ffmpeg-0.10.2.recipe

@@ -11,7 +11,7 @@ COPYRIGHT="
 	"
 SRC_URI="http://www.ffmpeg.org/releases/ffmpeg-0.10.2.tar.bz2"
 CHECKSUM_MD5="de1bd5fc4bbf3ef730a5361ee596fedd"
-REVISION="1"
+REVISION="2"
 ARCHITECTURES="x86_gcc2 ?x86"
 
 PATCHES="ffmpeg-0.10.2-gcc2.patch"
@@ -44,7 +44,9 @@ BUILD_REQUIRES="
 	cmd:gcc
 	cmd:ld
 	cmd:make
+	cmd:perl
 	cmd:pkg_config
+	cmd:texi2html
 	cmd:yasm
 	devel:libogg
 	devel:libspeex
@@ -57,8 +59,25 @@ BUILD_PREREQUIRES="
 	haiku_devel >= $haikuVersion
 	"
 
+GLOBAL_WRITABLE_FILES="
+	settings/ffserver.conf
+"
+
 SOURCE_DIR="$portVersionedName"
 
+PATCH()
+{
+	# patch hard-coded config file path
+	sed -i "s,/etc/ffserver.conf,$sysconfDir/ffserver.conf," \
+		ffserver.c \
+		doc/ffserver.texi
+
+	# patch hard-coded paths to perl
+	sed -i "s,/usr/bin/perl,$portPackageLinksDir/cmd:perl/bin/perl," \
+		Doxyfile \
+		doc/texi2pod.pl
+}
+
 BUILD()
 {
 	# not an auto tools configure
@@ -96,6 +115,10 @@ INSTALL()
 		libswscale
 	fixPkgconfig
 
+	# include the documented ffserver.conf
+	mkdir -p $docDir
+	cp doc/ffserver.conf $docDir
+
 	# devel package
 	packageEntries devel \
 		$developDir