Add -DWITH_INSTALL_AS_USER to the source build (naming matches the

same functionality of The Ports Collection).
This sets BINOWN, BINGRP, etc... to match current user.  This this
allows 'install', as used in 'make install', to succeed (assuming
user has write permissions).

Submitted by:	Simon J Gerraty <sjg@juniper.net>
Discussed on:	freebsd-arch

share/mk/bsd.own.mk

@@ -427,6 +427,7 @@ __DEFAULT_NO_OPTIONS = \
     HESIOD \
     ICONV \
     IDEA \
+    INSTALL_AS_USER \
     LIBCPLUSPLUS \
     NAND \
     OFED \
@@ -645,6 +646,17 @@ CTFCONVERT_CMD=
 CTFCONVERT_CMD=	@:
 .endif 
 
+.if ${MK_INSTALL_AS_USER} != "no"
+_uid!=	id -un
+.if ${_uid} != 0
+_gid!=	id -gn
+.for x in BIN CONF DOC INFO KMOD LIB MAN NLS SHARE
+$xOWN=	${_uid}
+$xGRP=	${_gid}
+.endfor
+.endif
+.endif
+
 .endif # !_WITHOUT_SRCCONF
 
 .endif	# !target(__<bsd.own.mk>__)