Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

* fix ctm(8) to use mkstemp() instead of tempnam() for tempfile
creation.

* Tag the internal err() function with __printflike to allow checking
for non-constant format string arguments (none exist)

* Use fmtcheck() to sanitize the tar command obtained via -t to make
sure it doesn't contain extraneous format operators.

Reviewed by: mikeh
MFC after: 1 week

(Not tested yet. I may insist that ctm be invoked with absolute path. /phk)

This patch fixes the concurrency problem, and adds a possibly useful -f switch
(which you can read about in the man page :-) ). It also removes the absolute
path from the invocation of ctm. I'll write a note about how to use a script
with sendmail and procmail or some such, and people can fix their PATH there.

BTW, this patch changes ctm_rmail.1, ctm_rmail.c and error.c in the ctm_rmail
directory.

Stephen.

Reviewed by: phk
Submitted by: Stephen McKay <syssgm@devetir.qld.gov.au>

CTM email tools.

Reviewed by: phk
Submitted by: Stephen McKay <syssgm@devetir.qld.gov.au>