filesystems/davfs2: allow to build with any 3.x version of `www/neon'

Assume that any more or less recent version would work, at least within
the current major series.  Upstream plans to get rid of this heuristics
altogether in the next release so this band-aid should suffice for now.

PR:	285860

filesystems/davfs2/Makefile

@@ -28,6 +28,9 @@ OPTIONS_SUB=	yes
 NLS_USES=	gettext-runtime
 NLS_CONFIGURE_OFF=	--disable-nls
 
+post-patch:
+	@${REINPLACE_CMD} -e 's, 33, ${:!seq 33 39!},' ${WRKSRC}/configure
+
 post-stage:
 	${CHMOD} -s ${STAGEDIR}${PREFIX}/sbin/mount.davfs
 	cd ${STAGEDIR}${DOCSDIR} && ${RM} AUTHORS COPYING INSTALL