[patch] Correct configure test for sin_len to compile on Tru64 Unix

[Wayne Davison]

On Tue, Mar 16, 2004 at 10:01:19AM +0900, Shinichi Maruyama wrote:
> 	This OS has sin_len in struct sockaddr_in. But after
> configure, HAVE_SOCKADDR_SIN_LEN remains undef in config.h.
> 	Needs patch like this ?

Yup -- much appreciated!  I've checked in your fix, plus an extra
cleanup of the define names in light of this fixed structure check.

..wayne..