Milter-greylist

Hi,

I found some inconsistencies in the usage information and man page;
no serious issues, just some polishing:

 - The -h option is missing both in usage() and the man page.
 - The -c and -r options are missing in usage().
 - The man page has "-a delay", usage() has "-a autowhite".
 - The man page has "-M prefixlen", usage has "-M prefix".

Here are diffs for milter-greylist.8 and milter-greylist.c:

$ diff milter-greylist.8.orig milter-greylist.8
42a43
> [\fB-h\fR]
157a159,161
> .B -h
> Show usage information.
> .TP

$ diff milter-greylist.c.orig milter-greylist.c
954,956c954,956
<           "usage: %s [-ADvqSTl] [-a autowhite] [-d dumpfile] \n"
<           "       [-P pidfile] [-M prefix] [-f configfile]\n"
<           "       [-w delay] [-u username] [-L cidrmask] -p socket\n", 
---
>           "usage: %s [-A] [-a delay] [-c] [-D] [-d dumpfile]\n"
>           "       [-f configfile] [-h] [-l] [-q] [-r] [-S] [-T] [-u username] [-v]\n"
>           "       [-w delay] [-L cidrmask] [-M prefixlen] [-P pidfile] -p socket\n", 

usage() now uses the same syntax as the man page.

mp.