UnixWare 7 patches for current CVS code.

Configure no longer recognizes UnixWare 7 as a supported OS.  The attached 
patches will correct this.

With these patches, config.guess will produce:

	i?86-pc-unixware7.0.1	(where ? is 3 or 5 depending on the chipset)

which config.sub will accept and pass on to configure.  Configure was changed 
to recognize 'unixware*' as a valid type instead of 'sysv5'.  I belive these 
changes brings the recognition of the unixware systems in line with the intent 
of the config.guess and config.sub routines (Intel x86 machines identified by 
iX86-pc constructs followed by -OSname).  The other option would be to have 
config.guess output 'i?86-pc-sysv5-unixware7.0.1', but I did not have time to 
get it to work in that form (yet).