/SLASHPLAY
sv_outofdatetime
Seconds an out-of-date server keeps running after Steam reports a newer version.
sv_outofdatetime <seconds> Examples
sv_outofdatetime 1800 Default, 30 minutes.
Arguments
secondsRequired- Grace period in seconds.
What it does
When Steam tells the server a newer build is out, the server warns and later shuts down so it can be updated. This sets that grace period. You rarely need to change it, keep the server updated instead.
Run it on your server
On a SLASHPLAY server, type it in the Console tab of the server page; the reply shows right under it. A value set there lasts until the server restarts. To keep it, add the line to cstrike/server.cfg. New to this? Start a CS 1.6 server first.
Your own
CS 1.6 server.
From $0.03 an hour, only while it runs. New accounts get 6 free tokens.