initctl: add -v,--version command line option

This patch adds the -v,--version option to initctl, which acts as an
alias to the 'version' command.  For now they end up in the same old
function, printing the program version.  However, in time this will be
changed so that the 'version' command asks a running Finit for its
version instead of assuming the daemon is of the same version.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

man/initctl.8

@@ -11,7 +11,7 @@
 .Nd Control tool for Finit
 .Sh SYNOPSIS
 .Nm /sbin/initctl
-.Op Fl bcfhlpqtv
+.Op Fl bcfhlpqtvV
 .Op COMMAND
 .Sh DESCRIPTION
 .Nm
@@ -41,16 +41,20 @@ Silent, only return status of command.
 Skip table headings.
 .It Fl v, -verbose
 Verbose output, where applicable.
+.It Fl V, -version
+Show program version.
 .El
 .Sh COMMANDS
 .Bl -tag -width Ds
 .It Nm Ar debug
-Toggle finit (daemon) debug to
+Toggle
+.Nm finit
+(daemon) debug to
 .Pa /dev/console
 .It Nm Ar help
 Show built-in help text
 .It Nm Ar version
-Show Finit (daemon) version
+Show program version
 .It Nm Ar ls | list
 List all
 .Cm *.conf