Rewrite the JOIN channel logic, dropping MaxJoins

Instead we fill the JOIN line up with as many channels as we can fit in
an IRC line. Rate limiting is done per command now, making MaxJoins
unnecessary.

modules/webadmin.cpp

@@ -231,7 +231,6 @@ public:
 		pNewUser->SetTimestampPrepend(WebSock.GetParam("prependtimestamp").ToBool());
 		pNewUser->SetTimezoneOffset(WebSock.GetParam("timezoneoffset").ToDouble());
 		pNewUser->SetJoinTries(WebSock.GetParam("jointries").ToUInt());
-		pNewUser->SetMaxJoins(WebSock.GetParam("maxjoins").ToUInt());
 
 		if (spSession->IsAdmin()) {
 			pNewUser->SetDenyLoadMod(WebSock.GetParam("denyloadmod").ToBool());
@@ -914,7 +913,6 @@ public:
 				Tmpl["TimestampFormat"] = pUser->GetTimestampFormat();
 				Tmpl["TimezoneOffset"] = CString(pUser->GetTimezoneOffset());
 				Tmpl["JoinTries"] = CString(pUser->JoinTries());
-				Tmpl["MaxJoins"] = CString(pUser->MaxJoins());
 
 				const set<CString>& ssAllowedHosts = pUser->GetAllowedHosts();
 				for (set<CString>::const_iterator it = ssAllowedHosts.begin(); it != ssAllowedHosts.end(); ++it) {