[PATCH 1/2] Add --verbose|-v to test-chmtime

This allows us replace perl when getting the mtime of a file because
of time zone conversions, though at the moment only one platform which
does this has been identified: Cygwin when used with ActiveState Perl
(as usual).

The output format is:

    <mtime1> TAB <filename1> <LF>
    <mtime2> TAB <filename2> <LF>
    ...

which, if only mtime is needed can be parsed with cut(1):

    test-chmtime -v +0 filename1 | cut -f 1

Also, the change adds a description of programs features, with examples.

Signed-off-by: Alex Riesen <redacted>
---
 test-chmtime.c |   91 +++++++++++++++++++++++++++++++++++++++++++-------------
 1 files changed, 70 insertions(+), 21 deletions(-)