added some minor feature to channels

- clean up of channels old (> storeperiod) cache file downloads called at rsglobal shutdown

- added extrafilehash and extra-remove to rschannels, so it chooses appropriate way to add files (correct book-keeping)
   - added extra files not copied to chan dir if over 100mb (high overhead)
- added limit to channels auto-download (1gig)




git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@2866 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/rsserver/p3face.h

@@ -45,6 +45,7 @@
 #include "services/p3Qblog.h"
 #include "services/p3blogs.h"
 #include "services/p3statusservice.h"
+#include "services/p3channels.h"
 
 
 /* The Main Interface Class - for controlling the server */
@@ -174,7 +175,7 @@ class RsServer: public RsControl, public RsThread
 		p3MsgService  *msgSrv;
 		p3ChatService *chatSrv;
 		p3StatusService *mStatusSrv;
-
+		p3Channels *mChannels;
 		/* caches (that need ticking) */
 		p3Ranking *mRanking;
 		p3Qblog *mQblog;