Added MaxClients public var to replace GetMaxClients (bug 3283, r=pred).

This is a hard bump of the plugin version number.  1.1 plugins compiled against this include set
will not run against earlier versions of SourceMod.

core/PlayerManager.cpp

@@ -251,6 +251,8 @@ void PlayerManager::OnServerActivate(edict_t *pEdictList, int edictCount, int cl
 		memset(m_AuthQueue, 0, sizeof(unsigned int) * (ABSOLUTE_PLAYER_LIMIT + 1));
 
 		g_NumPlayersToAuth = &m_AuthQueue[0];
+
+		g_PluginSys.SyncMaxClients(clientMax);
 	}
 	g_Extensions.CallOnCoreMapStart(pEdictList, edictCount, clientMax);
 	m_onActivate->Execute(NULL);