
To (re)build xl2tpd for openwrt:

cat OpenWrt-SDK-Linux-i686-1.tar.bz2 | tar -xvf -
cd ~/OpenWrt-SDK-Linux-i686-1
rm -r package/helloworld
svn co https://svn.openwrt.org/openwrt/branches/whiterussian whiterussian
cp xl2tpd-latest.tar.gz dl/
tar zxvf dl/xl2tpd-latest.tar.gz
cp -av dl/xl2tpd-latest/packaging/openwrt package/xl2tpd
md5sum dl/xl2tpd-latest.tar.gz

[ edit package/xl2tpd/Makefile and update PKG_VERSION and PKG_MD5SUM ]

make V=99

This should then give you the xl2tpd package.
