Breakes compilation

Revert "Makefile changes from Fedora"

This reverts commit 54d8ee56229fc00422f654b7129a2707bdd3e9b3.
Merge branch 'master' of github.com:xelerance/xl2tpd
Check write return code on control socket (fixes FTBFS with -Wall)
Add a license exception to link xl2tpd with OpenSSL