introduce man pages

Makefile

@@ -4,16 +4,19 @@ PREFIX     = /usr
 SYSCONFDIR = /etc
 BINDIR     = ${PREFIX}/bin
 DATADIR    = ${PREFIX}/share
+MANDIR     = ${PREFIX}/share/man
 
 install:
 	mkdir -p ${DESTDIR}${SYSCONFDIR}/tinyramfs \
 		     ${DESTDIR}${DATADIR}/tinyramfs \
+		     ${DESTDIR}${MANDIR}/man5 \
 		     ${DESTDIR}${BINDIR}
 	cp config        ${DESTDIR}${SYSCONFDIR}/tinyramfs
 	cp -R hooks      ${DESTDIR}${DATADIR}/tinyramfs
 	cp device-helper ${DESTDIR}${DATADIR}/tinyramfs
 	cp init          ${DESTDIR}${DATADIR}/tinyramfs
 	cp tinyramfs     ${DESTDIR}${BINDIR}/tinyramfs
+	cp docs/tinyramfs.5 ${DESTDIR}${MANDIR}/man5
 
 uninstall:
 	rm -f  ${DESTDIR}${BINDIR}/tinyramfs