Crypto timings

[Eric S. Raymond]

Hal Murray <hmurray at megapathdsl.net>:
> The speedup applies to any type of crypto.  I didn't bother implementing the 
> MD5 half.  The change is just cleaning up the per-digest initialization.  
> We'll want it for anything going forward.

Please commit it, then.  And please do the MD5 code in libntp/a_md5encrypt.c
and libntp/ssl_init.c to; might as well fix it all at once.
-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>