Remove support for Suhosin.

The project seems to be dead with no commits over the last year.
Also, the latest version lacks support for the 5.4 & 5.5 branches.

Although direct support for Suhosin has been removed from phpfarm,
it can still be used by adding the appropriate code in a custom
options.sh to fetch and apply the patch manually.
Minor tweak.
Merge branch 'master' of github.com:fpoirotte/phpfarm