update broken PKG_UPDATE rules, handle missing update rules * Makefile.in: add handling for packages with no update rule * src/gtk2.mk, src/gtk3.mk, src/libvpx.mk, src/taglib.mk, src/hunspell.mk, src/vala.mk : use github tags for version info * src/llvm.mk: add '?' to update url * src/openscenegraph.mk: update SED rule for version extraction * src/pthread-stubs.mk, src/qt5.mk, src/renderproto.mk, src/sm.mk, src/s2tc.mk, src/util-macros.mk: added dummy PKG_UPDATE rule * src/qscintilla.mk: change search name for version extraction * src/qtbase.mk: use short pkg version in update path * src/suitesparse.mk: update change in main url/version url * src/tre.mk: update download page link * src/vmime.mk: update download and update url * src/wget.mk, src/xapian-core.mk: update url, sed rule * src/wt.mk: update to use github download/update * src/src-msys-libcrypt.mk: update sed rule

--- a/src/gtk3.mk	Wed Mar 07 06:44:54 2018 -0500
+++ b/src/gtk3.mk	Fri Mar 09 11:46:42 2018 -0500
@@ -11,11 +11,11 @@
 $(PKG)_DEPS     := gettext libpng jpeg tiff jasper glib atk pango cairo gdk-pixbuf
 
 define $(PKG)_UPDATE
-    $(WGET) -q -O- 'http://git.gnome.org/browse/gtk+/refs/tags' | \
-    grep '<a href=' | \
-    $(SED) -n 's,.*<a[^>]*>\([0-9]*\.[0-9]*[02468]\.[^<]*\)<.*,\1,p' | \
+    $(WGET) -q -O- 'https://github.com/GNOME/gtk/tags' | \
+    $(SED) -n 's|.*releases/tag/\([^"]*\).*|\1|p' | \
     grep -v '^3\.9' | \
     grep '^3\.' | \
+    $(SORT) -Vr | \
     head -1
 endef