Merge pull request #19 from startersclan/docs/readme-add-deprecation-notices-for-ping-query

Docs (readme): Add deprecation notices for ping query

Author: leojonathanoh

README.md

@@ -34,7 +34,7 @@ SourceQuery -Address $address -Port $port -Engine 'Source' -Type 'info'
 SourceQuery -Address $address -Port $port -Engine 'Source' -Type 'players'
 # A2S_RULES query, Returns a hashtable of server cvars
 SourceQuery -Address $address -Port $port -Engine 'Source' -Type 'rules'
-# A2A_PING query. Returns a hashtable of whether the ping was successful
+# A2A_PING query (deprecated). Returns a hashtable of whether the ping was successful
 SourceQuery -Address $address -Port $port -Engine 'Source' -Type 'ping'
 
 # Goldsource Engine
@@ -44,7 +44,7 @@ SourceQuery -Address $address -Port $port -Engine 'Goldsource' -Type 'info'
 SourceQuery -Address $address -Port $port -Engine 'Goldsource' -Type 'players'
 # A2S_RULES query, Returns a hashtable of server cvars
 SourceQuery -Address $address -Port $port -Engine 'Goldsource' -Type 'rules'
-# A2A_PING query. Returns a hashtable of whether the ping was successful
+# A2A_PING query (deprecated). Returns a hashtable of whether the ping was successful
 SourceQuery -Address $address -Port $port -Engine 'Goldsource' -Type 'ping'
 ```
 
@@ -75,6 +75,10 @@ Engine           |       Games
 
 The functions will probably work on a lot more games than those in the list.
 
+Q: `ping` query not working for some games?
+
+`A2A_PING` is no longer supported on Counter Strike: Source and Team Fortress 2 servers, and is considered a deprecated feature. See official documentation [here](https://developer.valvesoftware.com/wiki/Server_queries#A2A_PING) for more information.
+
 ## Notes
 
 The functions are *stateless* - that is, `SourceQuery`, `SourceRcon`, and `GoldsourceRcon` are pure functions, storing no authentication or challenge states. This is to be expected for Source Queries, but not for Rcon. A possible future area of improvement would be to make `SourceRcon` and `GoldsourceRcon` construct and return a stateful Rcon object, that would improve client performance especially when multiple rcon commands need to be executed in sequence.