Revert "Patches from Fedora to use Openssl MD5 instead of our own"

This patch forced us to ask for a license exception, which we cannot do.

This reverts commit f6a1c043ac5ce31bb1ee368e1161d8474dc41646.
Revert "Add a license exception to link xl2tpd with OpenSSL"

Without commit f6a1c04 we no longer need to ask for a license exception.

This reverts commit f039398af5d97921ade559c0e6d5b11a818ddff5.
Changed CHANGES and version in l2tp.h