24 March add some more shell chars to illegal list of characters. 26 april 1992 Make 'network unreachable' a temporary error. smtp error return 552 (file too long) is now a fatal error. the code has been tested with the new portable V10 connection server code for the MIPS on research. 15 Oct 1992 Fix an error in smtpsched made it eat up all the memory in the machine from time to time. Bring inet's version up-to-date. Remove stale-lock messages to stderr in smtpsched: they are just logged. In smtp, make unknown-user a fatal error. Error processing codes in general weren't handled precisely right. Improved installation procedure for smtpqer and smtpsched to work better on a busy mail machine.