lib: Document --command-log-always in help

The --command-log-always was not being listed as a valid
option for when the operator issues a <daemon> --help
command line.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

lib/libfrr.c

@@ -143,6 +143,7 @@ static const struct optspec os_always = {
 	"      --scriptdir    Override scripts directory\n"
 	"      --log          Set Logging to stdout, syslog, or file:<name>\n"
 	"      --log-level    Set Logging Level to use, debug, info, warn, etc\n"
+	"      --command-log-always Always log every command, cannot be turned off\n"
 	"      --limit-fds    Limit number of fds supported\n",
 	lo_always
 };