ports/147131: [patch] textproc/xmlto: use `?=' for *_CMD like Mk/bsd.commands.mk does

[edwin at FreeBSD.org]

Synopsis: [patch] textproc/xmlto: use `?=' for *_CMD like Mk/bsd.commands.mk does

Responsible-Changed-From-To: freebsd-ports-bugs->portmgr
Responsible-Changed-By: edwin
Responsible-Changed-When: Thu May 27 13:30:50 UTC 2010
Responsible-Changed-Why: 
bsd.commands.mk is portmgr territory (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=147131