Improved plugin system:

- the user is asked at start wether to load or deny unregistered plugins, but can make it mind later in config->plugins
- added API and SVN numbers into required external plugin symbols
- user-defined plugin rules are dropped when a plugin changes (hash changes) or when the main executable changes.
- added new status flags (Plugin denied, missing API/SVN numbers)
- modified saveList()/loadList() to allow saving a list of rejected plugins as well.
- added methods in notifyBase and inherited classes to ask for plugin confirmation.

- adapted VOIP plugin to follow these new rules (API+SVN numbers). Other plugins should be adapted as well by addign the 
 missing symbols (RETROSHARE_PLUGIN_api and RETROSHARE_PLUGIN_revision).



git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@5529 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/serialiser/rstlvtypes.h

@@ -213,6 +213,7 @@ class RsTlvKeyValue: public RsTlvItem
 {
 	public:
 	 RsTlvKeyValue() { return; }
+	 RsTlvKeyValue(const std::string& k,const std::string& v): key(k),value(v) {}
 virtual ~RsTlvKeyValue() { return; }
 virtual uint32_t TlvSize();
 virtual void	 TlvClear();