Restore functionality to pack several kernels into release. All

kernels specified by KERNCONF are built and packed into release.
The first one is packed into kernel.txz, all others to
kernel.CONFIG.txz.

The first one is installed on bootables in /boot.

Makefile.inc1

@@ -887,10 +887,21 @@ distributekernel distributekernel.debug:
 	    ${CROSSENV} PATH=${TMPPATH} ${MAKE} KERNEL=${INSTKERNNAME} \
 	    DESTDIR=${DESTDIR}/${DISTDIR}/kernel \
 	    ${.TARGET:S/distributekernel/install/}
+.for _kernel in ${BUILDKERNELS:S/${INSTALLKERNEL}//}
+	cd ${KRNLOBJDIR}/${_kernel}; \
+	    ${CROSSENV} PATH=${TMPPATH} ${MAKE} \
+	    KERNEL=${INSTKERNNAME}.${_kernel} \
+	    DESTDIR=${DESTDIR}/${DISTDIR}/kernel.${_kernel} \
+	    ${.TARGET:S/distributekernel/install/}
+.endfor
 
 packagekernel:
-	${_+_}cd ${DESTDIR}/${DISTDIR}/kernel; \
+	cd ${DESTDIR}/${DISTDIR}/kernel; \
 	    tar cvJf ${DESTDIR}/${DISTDIR}/kernel.txz .
+.for _kernel in ${BUILDKERNELS:S/${INSTALLKERNEL}//}
+	cd ${DESTDIR}/${DISTDIR}/kernel.${_kernel}; \
+	    tar cvJf ${DESTDIR}/${DISTDIR}/kernel.${_kernel}.txz .
+.endfor
 
 #
 # doxygen

release/Makefile

@@ -75,7 +75,7 @@ base.txz:
 kernel.txz:
 	-mkdir ${DISTDIR}
 	cd ${WORLDDIR} && ${IMAKE} distributekernel packagekernel DISTDIR=${DISTDIR}
-	mv ${DISTDIR}/kernel.txz ${.OBJDIR}
+	mv ${DISTDIR}/kernel*.txz ${.OBJDIR}
 
 src.txz:
 	-mkdir -p ${DISTDIR}/usr