irc.php: clarify that we are using infinite while loop
irc.php: clarify that we are using infinite while loop

We never break the main while loop, so don't use a variable (which was
always set to `true`) to control it. Just use the literal `true`.

hemberger/smr,smrealms/smr,hemberger/smr,hemberger/smr,smrealms/smr,smrealms/smr,hemberger/smr