btrbk: add "-S" command line option (shortcut for --print-schedule)

ChangeLog

@@ -5,6 +5,7 @@ btrbk-0.27.0-dev
       "readlink" and "cat /proc/self/mountinfo").
   * Add "preserve_hour_of_day" configuration option (close #202).
   * Allow backup of filesystem root using "subvolume ." (close #240).
+  * Add "-S" command line option (shortcut for --print-schedule).
   * Bugfix: correct scheduling of "first weekly backup in month/year"
     (close #217). Note that this change may result in (previously
     preserved) backups to be deleted!

btrbk

@@ -321,7 +321,7 @@ options:
    -l, --loglevel=LEVEL      set logging level (warn, info, debug, trace)
    -t, --table               change output to table format
        --format=FORMAT       change output format, FORMAT=table|long|raw
-       --print-schedule      print scheduler details (for the "run" command)
+   -S, --print-schedule      print scheduler details (for the "run" command)
        --progress            show progress bar on send-receive operation
 
 commands:
@@ -4451,7 +4451,7 @@ MAIN:
     'progress'           => \$show_progress,
     'table|t'            => sub { $output_format = "table" },
     'format=s'           => \$output_format,
-    'print-schedule'     => \$print_schedule,
+    'print-schedule|S'   => \$print_schedule,
     'lockfile=s'         => \$lockfile_cmdline,
     'override=s'         => \@config_override_cmdline,  # e.g. --override=incremental=no
    ))

doc/btrbk.1.asciidoc

@@ -21,7 +21,7 @@ btrbk [-h|--help] [--version]
       [-p|--preserve] [--preserve-snapshots] [--preserve-backups]
       [-v|--verbose] [-q|--quiet] [-l|--loglevel <level>]
       [-t|--table] [--format <output-format>]
-      [--progress] [--print-schedule]
+      [--progress] [-S|--print-schedule]
       [--override <config_option>=<value>]
       [--lockfile <file>]
       <command> [<args>]
@@ -125,7 +125,7 @@ OPTIONS
 --progress::
     Show progress bar on send-receive operation.
 
---print-schedule::
+-S, --print-schedule::
     Print detailed scheduler information on *run*, *snapshot*,
     *resume*, *prune* and *archive* commands. Use the '--format'
     command line option to switch between different output formats.

doc/btrbk.conf.5.asciidoc

@@ -424,7 +424,7 @@ The reference time (which defines the beginning of a day, week, month
 or year) for all date/time calculations is the local time of the host
 running btrbk.
 
-Hint: Run btrbk with the '--print-schedule' option to get a
+Hint: Run btrbk with the '-S', '--print-schedule' option to get a
 comprehensive output of the scheduler results.
 
 Caveats: