Tweak.
 [rsc] --rw-rw-r-- M 615310 presotto sys 4509 Dec  2 11:49 sys/man/8/smtp
	/n/sourcesdump/2005/1202/plan9/sys/man/8/smtp:52,71 - 
	/n/sourcesdump/2005/1203/plan9/sys/man/8/smtp:52,67
	  .B -d
	  turn on debugging to standard error.
	  .TP
	- .B -a
	- authenticate ourself to the server if the server
	- supports PLAIN authentication and allows us to first
	- start up an encrypted TLS connection
	- .TP
	  .B -s
	  if the server supports the ESMTP extension to use TLS encryption, turn it on for
	  this session.  See RFC3207 for details.
	  .TP
	- .B -a
	- if the server supports the ESMTP extension to use TLS encryption, turn it
	- on.  If the server also supports the PLAIN (user + password) authentication,
	+ if the server also supports PLAIN or LOGIN authentication,
	  authenticate to the server using a password from
	- .IR factotum (4).  See RFC's 3207 and 2554.
	+ .IR factotum (4).
	+ See RFCs 3207 and 2554.
	+ This option also implies
	+ .B -s .
	  .TP
	  .B -u
	  specify a user name to be used in authentication.  The default name is
	/n/sourcesdump/2005/1202/plan9/sys/man/8/smtp:92,98 - 
	/n/sourcesdump/2005/1203/plan9/sys/man/8/smtp:88,94
	  .PP
	  Finally if
	  .I .domain
	- is given, it is appended to the end of any unqaulified system names
	+ is given, it is appended to the end of any unqualified system names
	  in the envelope or header.
	  .PP
	  .I Smtpd
	/n/sourcesdump/2005/1202/plan9/sys/man/8/smtp:118,126 - 
	/n/sourcesdump/2005/1203/plan9/sys/man/8/smtp:114,124
	  .BR /mail/lib/whitelist ,
	  an append only file.
	  Addresses can be added to the whitelist by the administrator.  However,
	- the usual way for addresses to be added is by smtpd itself.  Whenever,
	- a message is received and the sender's address isn't on the whitelist,
	- .B smtpd
	+ the usual way for addresses to be added is by
	+ .I smtpd
	+ itself.
	+ Whenever a message is received and the sender's address isn't on the whitelist,
	+ .I smtpd
	  first looks for the file,
	  .B /mail/grey/<remote ipaddr>/<local ipaddr>/<recipient> .
	  If that file exists, the remote address is added to the whitelist.  If

Add Unix syslog.
 [rsc] --rw-rw-r-- M 615310 glenda sys 5376 Dec  2 15:01 lib/ndb/common
	/n/sourcesdump/2005/1202/plan9/lib/ndb/common:216,221 - 
	/n/sourcesdump/2005/1203/plan9/lib/ndb/common:216,222
	  udp=ntp port=123
	  udp=netbios-ns port=137
	  udp=snmp port=161
	+ udp=syslog port=514
	  udp=rip port=520
	  udp=dhcp6c port=546
	  udp=dhcp6s port=547

Fall back if cs fails to be useful.
 [rsc] --rw-rw-r-- M 615310 glenda sys 18036 Dec  2 15:05 sys/src/cmd/auth/factotum/util.c
	/n/sourcesdump/2005/1202/plan9/sys/src/cmd/auth/factotum/util.c:26,37 - 
	/n/sourcesdump/2005/1203/plan9/sys/src/cmd/auth/factotum/util.c:26,36
	  _authdial(char *net, char *authdom)
	  {
	  	int fd;
	- 	int vanilla;
	  
	- 	vanilla = net==nil || strcmp(net, "/net")==0;
	- 
	- 	if(!vanilla || bindnetcs()>=0)
	- 		return authdial(net, authdom);
	+ 	if(bindnetcs() >= 0 && (fd=authdial(net, authdom)) >= 0)
	+ 		return fd;
	+ 	if(net != nil && strcmp(net, "/net") != 0)
	+ 		return -1;
	  
	  	/* use the auth sever passed to us as an arg */
	  	if(authaddr == nil)