Make it possible to specify display of stats in a particular 'container' by separating category and container with a period.

e.g. "show stats server.network"
I failed to realize this had already been implemented without the period in the show stats command (as the command help had not been updated).
However, I would prefer the . approach as it will allow specifying multiple stats, easier wildcarding, etc.
This commit also prevents any stat from having a period in its short name.

OpenSim/Framework/Monitoring/Stats/Stat.cs

@@ -42,6 +42,8 @@ namespace OpenSim.Framework.Monitoring
     {
 //        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
 
+        public static readonly char[] DisallowedShortNameCharacters = { '.' };
+
         /// <summary>
         /// Category of this stat (e.g. cache, scene, etc).
         /// </summary>
@@ -166,6 +168,12 @@ namespace OpenSim.Framework.Monitoring
                 throw new Exception(
                     string.Format("Stat cannot be in category '{0}' since this is reserved for a subcommand", category));
 
+            foreach (char c in DisallowedShortNameCharacters)
+            {
+                if (shortName.IndexOf(c) != -1)
+                    throw new Exception(string.Format("Stat name {0} cannot contain character {1}", shortName, c));
+            }
+
             ShortName = shortName;
             Name = name;
             Description = description;

OpenSim/Framework/Monitoring/StatsManager.cs

@@ -68,12 +68,13 @@ namespace OpenSim.Framework.Monitoring
                 "General",
                 false,
                 "show stats",
-                "show stats [list|all|<category>]",
+                "show stats [list|all|<category>[.<container>]",
                 "Show statistical information for this server",
                 "If no final argument is specified then legacy statistics information is currently shown.\n"
                     + "If list is specified then statistic categories are shown.\n"
                     + "If all is specified then all registered statistics are shown.\n"
                     + "If a category name is specified then only statistics from that category are shown.\n"
+                    + "If a category container is also specified then only statistics from that category in that container are shown.\n"
                     + "THIS STATS FACILITY IS EXPERIMENTAL AND DOES NOT YET CONTAIN ALL STATS",
                 HandleShowStatsCommand);
         }
@@ -84,8 +85,11 @@ namespace OpenSim.Framework.Monitoring
 
             if (cmd.Length > 2)
             {
-                var categoryName = cmd[2];
+                string name = cmd[2];
-                var containerName = cmd.Length > 3 ? cmd[3] : String.Empty;
+                string[] components = name.Split('.');
+
+                string categoryName = components[0];
+                string containerName = components.Length > 1 ? components[1] : null;
 
                 if (categoryName == AllSubCommand)
                 {
@@ -107,7 +111,9 @@ namespace OpenSim.Framework.Monitoring
                     else
                     {
                         if (String.IsNullOrEmpty(containerName))
+                        {
                             OutputCategoryStatsToConsole(con, category);
+                        }
                         else
                         {
                             SortedDictionary<string, Stat> container;