Log Message:
Fix botched update of nessus.
Need to BUILDLINK_ABI_DEPENDS on the 2.2.11 versions of the libraries.
Bump PKGREVISION wholesale to disambiguate the fixed packages from the botched
ones and depend on them.
Use GPLed version of the plugins instead of the non-free version.

While here fix permissions of PKG_SYSCONFDIR in nessus-core/Makefile.