Change make distribution so that it now call installconfig in all dirs along

with the current behaviour of calling "distribution" in the etc target.

This allows mergemaster/etcupdate to still work when some configuration will be
moved to be handled in the same directories their source code lives in.

Makefile.inc1

@@ -996,10 +996,15 @@ redistribute: .MAKE
 	    DISTRIBUTION=lib32
 .endif
 
-distrib-dirs distribution: .MAKE
+distrib-dirs: .MAKE
 	cd ${.CURDIR}/etc; ${CROSSENV} PATH=${TMPPATH} ${MAKE} \
 	    ${IMAKE_INSTALL} ${IMAKE_MTREE} METALOG=${METALOG} ${.TARGET}
 
+distribution: .MAKE
+	cd ${.CURDIR}/etc; ${CROSSENV} PATH=${TMPPATH} ${MAKE} \
+	    ${IMAKE_INSTALL} ${IMAKE_MTREE} METALOG=${METALOG} ${.TARGET}
+	${_+_}cd ${.CURDIR}; ${MAKE} -f Makefile.inc1 installconfig
+
 #
 # buildkernel and installkernel
 #