Moved man pages for config files to a separate directory.

man/Makefile.am

@@ -0,0 +1,11 @@
+dist_man_MANS = ipsec.conf.5 ipsec.secrets.5
+EXTRA_DIST = ipsec.conf.5.in ipsec.secrets.5.in
+CLEANFILES = ipsec.conf.5 ipsec.secrets.5
+
+SUFFIXES = .in
+
+.in:
+	sed \
+	-e "s:@IPSEC_VERSION@:$(PACKAGE_VERSION):" \
+	$(srcdir)/$@.in > $@
+