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In
telnet, typing ^C sends ^C but no longer discards output (see below). Use ^C^O to terminate the active program and start discarding output. Originally discussed in Mellvik/TLVC#215.While debugging ghaerr/microwindows#160 which invovled running
sl, it was noticed thatsldisplays output continuously, but also ignores ^C/SIGINT. When a user types ^C to terminate sl, on a shell nothing happens (thesltrain keeps moving), but from within a telnet session, the system appears to hang (because of telnet discarding sl's streaming output). It was thus decided that the two-character sequence ^C^O should be used for very fast remote hosts rather than discarding output when programs might ignore SIGINT.Various other small source cleanups and a volatile jiffies variable access fixed in network inet_write().