K 10
svn:author
V 3
yar
K 8
svn:date
V 27
2003-07-09T13:54:33.000000Z
K 7
svn:log
V 503
Block SIGURG while reading from the control channel.

Rationale:

SIGURG is configured by ftpd to interrupt system calls, which is useful
during data transfers.  However, SIGURG could interrupt I/O on the
control channel as well, which was mistaken for the end of the session.

A practical example could be aborting the download of a tiny file,
when the abort sequence reached ftpd after ftpd had passed the file
data to the system and returned to its command loop.

Reported by:	ceri
MFC after:	1 week

END