ZNC: Fix webadmin, allow external config and minor fixes

* Fix the webadmin module and add the themes

 * Allow providing ZNC an external config (closes #9110)

 * Allow specifying the user and group to run ZNC as (needs su when using
   external config)

 * Allow providing a certificate for incoming SSL connections

 * Reduce buildtime by not rebuilding everything everytime

Signed-off-by: Jonas Gorski <jonas.gorski+openwrt@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/packages@26722 3c298f89-4303-0410-b956-a3cf2f4a3e73

net/znc/patches/003-Reduce_rebuild_time.patch

@@ -0,0 +1,32 @@
+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
+@@ -96,7 +96,7 @@ clean:
+ distclean: clean
+ 	rm -rf $(DISTCLEAN)
+ 
+-%.o: %.cpp Makefile
++%.o: %.cpp
+ 	@mkdir -p .depend
+ 	$(E) Building $@...
+ 	$(Q)$(CXX) $(CXXFLAGS) -c -o $@ $< -MMD -MF .depend/$@.dep
+--- a/modules/Makefile.in
++++ b/modules/Makefile.in
+@@ -114,7 +114,7 @@ install_metadirs: create_install_dir
+ clean:
+ 	rm -rf $(CLEAN)
+ 
+-%.so: %.cpp Makefile
++%.so: %.cpp
+ 	@mkdir -p .depend
+ 	@mkdir -p extra
+ 	$(E) Building $(if $(filter %extra/,$(dir $<)),extra )module $(notdir $(basename $@))...