znc: copy from old packages and add PKG_LICENSE

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

net/znc/patches/003-Reduce_rebuild_time.patch

@@ -0,0 +1,38 @@
+From 94aff4c3389111fc85054eb06b40bea26a216d0c Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jonas.gorski+openwrt@gmail.com>
+Date: Sat, 16 Apr 2011 05:51:04 +0200
+Subject: [PATCH] Don't rebuild everything when the Makefile's timestamp changed
+
+---
+ Makefile.in         |    2 +-
+ modules/Makefile.in |    2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -104,7 +104,7 @@ clean:
+ distclean: clean
+ 	rm -rf $(DISTCLEAN)
+ 
+-src/%.o: src/%.cpp Makefile
++src/%.o: src/%.cpp
+ 	@mkdir -p .depend src
+ 	$(E) Building core object $*...
+ 	$(Q)$(CXX) $(CXXFLAGS) -c -o $@ $< -MD -MF .depend/$*.dep -MT $@
+--- a/modules/Makefile.in
++++ b/modules/Makefile.in
+@@ -117,12 +117,12 @@ install_datadir:
+ clean:
+ 	rm -rf $(CLEAN)
+ 
+-%.o: %.cpp Makefile
++%.o: %.cpp
+ 	@mkdir -p .depend
+ 	$(E) Building module $(notdir $(basename $@))...
+ 	$(Q)$(CXX) $(MODFLAGS) -c -o $@ $< $($(notdir $(basename $@))CXXFLAGS) -MD -MF .depend/$(notdir $@).dep
+ 
+-%.so: %.o Makefile
++%.so: %.o
+ 	$(E) "Linking  module" $(notdir $(basename $@))...
+ 	$(Q)$(CXX) $(MODFLAGS) $(LDFLAGS) $(MODLINK) -o $@ $< $($(notdir $(basename $@))LDFLAGS) $(LIBS)
+