provision.sh: fix mastertickets zip handling
provision: upgrade trac to 0.12.5

Remove one MP patch from use as it is applied in 0.12.5 already.
post-install: 20generate-cert.sh on by default as ssl is required by install
deleted
provision: fix prefix usage
fix
provision: silence the config sed spam
provision: fix the bug terminating the installation
provision: fix wget function and use