/usr/share/ircII/script/undernet is in ircii 20151120-1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | # $eterna: undernet,v 1.2 2001/08/12 15:57:12 mrg Exp $
#
on ^367 * if ([$4] != []) {echo *** $1 \($3 - $stime($4)) $2} {echo *** $1-}
on ^333 * echo *** Topic for $1 set by $2 on $stime($3)
on ^317 * if (index(012345679 $3) != -1) {echo *** $1 has been idle for $2 seconds. Signon at $stime($3)} {echo *** $1 has been idle for $2 seconds.}
On ^329 "*" echo *** Channel $1 created $stime($2)
alias silence quote silence
alias sile quote silence
on ^raw_irc "% SILENCE %" echo *** $*
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