Revision 396260

Switch to USES=libedit.

Instead of manually adding both a build- and a run-time dependency on
libedit from ports, use USES=libedit instead. Not only does it take care of
adding the proper dependency, but it also sets CMAKE_PREFIX_PATH to
${LOCALBASE} to make sure that the version in ports is preferred instead of
the one in base.

This is a dependency for moving to CMake 3.3.x, as starting with 3.3.0 calls
to find_library() will also look in the $PATH environment variable and end
up finding libedit from base by default (see bug 202516).

PR:		202618
Approved by:	maintainer timeout (ale, 14 days)