ip_conntrack_irc, allowance for quoted filenames

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When the irssi (www.irssi.org) IRC client is asked to DCC SEND a file with a filename containing spaces, it does so by leaving the spaces intact and quoting the filename (""). ip_conntrack_irc.c:parse_dcc() however can't handle the embedded spaces.

I haven't checked other clients but I assume they might do the same. Is the attached hack (against 2.4.20) acceptable? Should this be solved differently and/or elsewhere?

Rene.