Add new -T|--toggle option to strace

["Conrad Scott" <Conrad dot Scott at dsl dot pipex dot com>]

As per a discussion yesterday with Chris, I've added a new option to
strace, -T or --toggle, to toggle tracing in a process already being
straced.

One other change I made was to replace a use of ExitProcess() with
exit() --- otherwise some error messages didn't appear since the stdio
buffers weren't being flushed.

I've also updated the section for strace in utils.sgml. I know that Joshua
has been holding off on changing utils.sgml (see
http://sources.redhat.com/ml/cygwin-patches/2002-q2/msg00276.html) so I
don't know whether you want this update or not. It's not much more than a
cut and paste from the usage message in strace.cc.

ChangeLog appended here and attached (to keep its format out of Outlook's
clutches).

// Conrad

2002-06-07  Conrad Scott  <conrad.scott@dsl.pipex.com>

 * strace.cc (toggle): New global variable.
 (error): Use exit instead of ExitProcess so that stdio buffers get
 flushed.
 (create_child): Remove command line error checking.
 (dostrace): Ditto.
 (dotoggle): New function.
 (usage): Add entry for new option -T|--toggle. Alphabetize.
 (longopts): Add new option -T|--toggle.
 (opts): Ditto.
 (main): Handle new -T|--toggle option. Move all command line checking
 here from other functions.
 * utils.sgml: Update section for strace.

Attachment: strace.patch
Description: Binary data

Attachment: utils.patch
Description: Binary data

Attachment: ChangeLog.txt
Description: Text document