Added Authenticated Forums. This required quite a bit of

additional functionality in other places, including:
 * add Sign / Verify functions to authxpgp
 * sign/verify messages, and control flags for p3distrib/p3forums.
 * add authmgr to p3distrib etc.
 * added AUTH flags to rsforums interface.



git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@867 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/rsiface/rsforums.h

@@ -43,6 +43,8 @@ class ForumInfo
 	std::wstring forumDesc;
 
 	uint32_t forumFlags;
+	uint32_t subscribeFlags;
+
 	uint32_t pop;
 
 	time_t lastPost;