[issue413] Small fix for dhclient(8)

[Matthew Dillon]

:New submission from Francis GUDIN <fgudin at nerim.net>:
:
:dhclient(8) mentions omshell(8) instead of omshell(1).
:The attached src/sbin/dhclient/client/dhclient.8.patch is updated to fixes =
:it.

    It looks like there are more issues with dhclient then just the
    patch set.  The PATCHES for /usr/src/sbin/dhclient/client
    were never added to SRCS so none of them ever get applied.

    I will fix the patches issues as well as incorporate your fix.

						-Matt