textproc/luaexpat-51

USES=lua gained flavors.

Ports using USES=lua:module or lua:flavors will be flavored.  A range of
supported lua versions can be set using XX-YY (or XX-, or -YY, or simply ZZ)
for ports not supporting all lua versions.

USES=lua sets LUA_FLAVOR that needs to be used on all dependencies of
flavored lua ports, in a similar way as PHP or Python flavors.

PR:		245038
Submitted by:	andrew tao11 riddles org uk
Reviewed by:	mat, kevans, russ haley gmail com
Approved by:	mat (portmgr)
Differential Revision:	https://reviews.freebsd.org/D16494

- Switch textproc/luaexpat to default version of lua - Introduce textproc/luaexpat-51 that uses lua 5.1 - Use textproc/luaexpat-51 in net-im/prosody

This fixes the build of multimedia/libquvi-scripts09 (60 ports skipped,
including gnome3)

With hat:	portmgr