Log Message:
www/nginx-devel: third-party modules management (+)

Update third-party modules to their recent versions
or snapshots:
o) naxsi: 1.6 -> 1.7;
o) lua: 0.10.27 -> 0.10.28;
o) headers_more: 0.37 -> 0.38;
o) cache_purge: 2.5.1 -> 2.5.3;
o) vts: bf64dbf -> b6f6528.

Bump PKGREVISION.