OSF sia stuff in 0.4b

[Mark Davies <mark@MCS.VUW.AC.NZ>]

Hi,
   The Makefile for the sia lib (lib/auth/sia) in 0.4b hasn't been updated to
deal with the possibility of using openssl's libcrypto rather than libdes and 
also tries to do the link explicitly with "ld" rather than letting libtool do 
it so the library search paths aren't getting set properly.

I've made a quick hack to the Makefile to get it to build for me but someone 
who understands autoconf can probably fix this up properly pretty easily.

cheers
mark