Describe fossil.
 [rsc] --rw-rw-r-- M 197601 glenda sys 1392 Nov  2 01:13 sys/man/6/users
	/n/sourcesdump/2005/1102/plan9/sys/man/6/users:8,18 - 
	/n/sourcesdump/2005/1103/plan9/sys/man/6/users:8,16
	  by convention.
	  Each line in the file has the format
	  .IP
	- .IB num : name : leader :\fImembers\fP
	+ .IB id : name : leader :\fImembers\fP
	  .PP
	  where
	- .I num
	- is a decimal integer,
	  .I name
	  and
	  .I leader
	/n/sourcesdump/2005/1102/plan9/sys/man/6/users:46,69 - 
	/n/sourcesdump/2005/1103/plan9/sys/man/6/users:44,75
	  are ignored.
	  .PP
	  The
	- .I num
	- in a line is a number used internally by a file server;
	- there should be no duplicate
	- .IR num s
	+ .I id
	+ in a line is an identifier used in the on-disk structures maintained
	+ by a file server; there should be no duplicate
	+ .IR id s
	  in the file.
	- A negative
	- .I num
	+ In
	+ .IR fossil (4),
	+ .IR id s
	+ are arbitrary text strings, typically the same as
	+ .IR name .
	+ In older Plan 9 file servers,
	+ .IR id s
	+ are small decimal numbers.
	+ In those, 
	+ a negative
	+ .I id
	  is special: a user with a negative
	- .I num
	+ .I id
	  cannot attach to the file server.
	  The file
	  .B /adm/users
	  itself is owned by user
	- .IR adm ,
	- having a negative
	- .IR num ,
	+ .I adm
	  and write protected to others,
	  so it can only be changed via console commands.
	  .SH "SEE ALSO"
	  .IR intro (5),
	- .IR stat (5)
	+ .IR stat (5),
	+ .IR fossilcons (8)

Handle bogus dates better.
 [rsc] --rw-rw-r-- M 197601 glenda sys 5684 Nov  2 10:37 sys/src/cmd/ip/imap4d/date.c
	/n/sourcesdump/2005/1102/plan9/sys/src/cmd/ip/imap4d/date.c:30,36 - 
	/n/sourcesdump/2005/1103/plan9/sys/src/cmd/ip/imap4d/date.c:30,36
	  	if(tm->tzoff < 0)
	  		plus = "";
	  	m = 0;
	- 	if(tm->wday != 8){
	+ 	if(0 <= tm->wday && tm->wday < 7){
	  		m = snprint(s, n, "%s, ", wdayname[tm->wday]);
	  		if(m < 0)
	  			return m;

Zero returned memory.
 [rsc] --rw-rw-r-- M 197601 glenda sys 5674 Nov  2 15:49 sys/src/9/port/alloc.c
	/n/sourcesdump/2005/1102/plan9/sys/src/9/port/alloc.c:227,232 - 
	/n/sourcesdump/2005/1103/plan9/sys/src/9/port/alloc.c:227,234
	  		setmalloctag(v, getcallerpc(&size));
	  		setrealloctag(v, 0);
	  	}
	+ 	if(v)
	+ 		memset(v, 0, size);
	  	return v;
	  }
	  
 [rsc] --rw-rw-r-- M 197601 glenda sys 6067 Nov  2 20:42 sys/src/9/boot/boot.c
	/n/sourcesdump/2005/1102/plan9/sys/src/9/boot/boot.c:69,74 - 
	/n/sourcesdump/2005/1103/plan9/sys/src/9/boot/boot.c:69,76
	  	/*
	  	 *  pick a method and initialize it
	  	 */
	+ 	if(method[0].name == nil)
	+ 		fatal("no boot methods");
	  	mp = rootserver(argc ? *argv : 0);
	  	(*mp->config)(mp);
	  	islocal = strcmp(mp->name, "local") == 0;
 [rsc] --rw-rw-r-- M 197601 glenda sys 6067 Nov  2 20:42 sys/src/9/boot/boot.c