perl-modules: moved to github

git-svn-id: svn://svn.openwrt.org/openwrt/packages@41821 3c298f89-4303-0410-b956-a3cf2f4a3e73
rng-tools: moved to github

git-svn-id: svn://svn.openwrt.org/openwrt/packages@41822 3c298f89-4303-0410-b956-a3cf2f4a3e73
icecast: moved to github

git-svn-id: svn://svn.openwrt.org/openwrt/packages@41853 3c298f89-4303-0410-b956-a3cf2f4a3e73
giflib, tiff: readd here as they are abandoned

git-svn-id: svn://svn.openwrt.org/openwrt/packages@41868 3c298f89-4303-0410-b956-a3cf2f4a3e73
motion: moved to github

git-svn-id: svn://svn.openwrt.org/openwrt/packages@41869 3c298f89-4303-0410-b956-a3cf2f4a3e73
ffmpeg: moved to github

git-svn-id: svn://svn.openwrt.org/openwrt/packages@41901 3c298f89-4303-0410-b956-a3cf2f4a3e73