1) replace +%e by +%d, unescaped blanks don't work at all in file names
2) replace +%b by +%m to make log files sort better by month
3) replace the home-grown +%Y.%m.%d by the standard +%F (= +%Y-%m-%d)
from Tim van der Molen <tbvdm at xs4all dot nl>, thanks!
ok okan@

1) advertise *.local and next_part near the top of the three scripts
2) daily: mention smtpd(8) mailq behaviour (like for sendmail, postfix, exim)
3) weekly: drop a comment trivially rehashing the next two lines of code
documenting next_part in the scripts was suggested by jmc@
ok sthen@ okan@ halex@; "i won't object" ajacoutot@

Do not attempt to copy a larger partition onto a smaller one.
Backup of non-ffs root partitions was never supported, so don't even try.
(Both of the above suggested by guenther@).
Also add error messages in case ROOTBACKUP is switched on but severely
misconfigured - those were silently ignored in the past:
/altroot not defined or wrong type or on the same device as root.
otto@ agrees that checking the sizes makes sense

suggested, tweaked and ok by guenther@

i.e. rely on the PATH set up in the root crontab(5)
in case /usr/local/bin is needed, daily.local is a logical place to append it
suggested by ajacoutot@; "i like this" okan@; feedback jmc@ deraadt@;
"i don't strongly object" sthen@

by moving it down to the bottom of the code;
"I definitely like this"  ajacoutot@

When set to 0, daily(8) won't send mail unless there is something to report.
Using feedback from kettenis@ henning@ jmc@
OK sthen@ jmc@

in order not to annoy parser scripts and their owners (like henning@)

add the same infrastructure to daily; silencing daily needs another step
discussed with ajacoutot@ okan@ todd@ sthen@ deraadt@ jmc@
"immediately commit" deraadt@ (without seeing the final diff)

while here, remove the misleading shbang and an unused variable
and add the missing cross reference to ac(8)
ok sthen@ jmc@

(output logs are still umask 077)
"i think this is right" deraadt@

the / -> /altroot copy.  OK deraadt@

ok millert@

- no more /var/spool/lpd (lpd uses /var/spool/output)
- no more /var/preserve (old vi directory)
- update docs to reflect this
help with systrace provos@
help and ok millert@

of the n'th (n>1) file fails, the previous ones get removed before exit(1)
Idea by jason; ok millert deraadt

daily, weekly, and monthly.  Closes PR 3017.

ok millert@

That way we avoid a flurry of transient calendar mail in the mailq.

symbolic links (the -h flag is for compatibility only); millert@ ok

Since /tmp might be a link to /var/tmp, prune at ssh-* or .X11-unix
like the find on /tmp does.

Ie: ``CALENDAR=0'' will turn it off which is useful for machines with
no local users that do not run YP.