[network]Network lag meter and server admin controls

[www2]

I heft today play some time with the latest svn build (svn 12053 for client and svn 12052 for server).

And i heft some ideas to improve for the debugging and server administration.

1. lagmeter.

This meter show the server/network lag in ms.

working:
send a ping packet each 2 or 3 to the server and show the lag

ingame commands:
#turn the lagmeter on or off
>/lagmeter

can use by all users.

2. server and client bandwidth meter.

This shows the bandwidth use on the server and for the user client.

ingame commands:

#turn the server bandwidth meter on or off
#and can only use by the game/server admin's.
>/bwmeter server <on/off>

#turn the client bandwidth meter on or off
#and can use by all user
>/bwmeter client <on/off>

3. ingame admin login.

This enable the admin mode for the user.

ingame commands:

>su <passwd>

security notes:

a user can only 3x type the wrong password be for a one hour ipban to the root login.