Currently, we have no way of checking our installed ports for conflicting 
files when a port/package is being installed.

With the attached patch to bsd.port.mk and pr bin/13649 (4.0-CURRENT) or
bin/13647 (3.2-STABLE) applied to pkg_install tools or ports collection
will be able to check the system for conflicting ports.

Place the following into a port's Makefile:

CONFLICTS=      apache*-1.2* apache*-1.3.[012345] apache-*+ssl_*

The CONFLICTS variable uses shell meta characters (  []*?<>,<=,>= ), to do
pattern matching on conflicting ports.

will result in @pkgcfl directives in its packing list.

@pkgcfl apache*-1.2*
@pkgcfl apache*-1.3.[012345]
@pkgcfl apache-*+ssl_*

bsd.port.mk will check for conflicting packages during the install of the
port.  If it detects a conflict, it will not install the port until the
offending port is removed from the system.

NOTE: By setting ENABLE_CONFLICTS to NO, it will disable conflict checking
      for the port install and for the building of the port's package.


Currently, the patch is set to allow Conflict checking for CURRENT
(OSVERSION >= 400009) and 3.2-STABLE (OSVERSION >= 320001).  These will need
to be changed to the appropriate values.

Fix: Apply the attached patched to bsd.port.mk.