[illumos-Developer] webrev: removal of "patch" (aka sparse package) support from SVR4 tools

[Garrett D'Amore]

I've removed support for "sparse" packages (i.e. those special patch
packages that only Sun was ever able to deliver.)  illumos will not be
supporting this style of "dim-sum" patching; if a patch is necessary
then the whole package that delivers the patch will be installed.  (Dim
sum patching, and the problems related to it, were the most often cited
reason for ditching SVR4 and inventing the IPS packaging system.)

Now, I've also made some other cleanups, mostly to make libadm and
libpkg lint clean.  (In the process a few genuine bugs were found and
fixed. :-)

Please review the changes here:

http://mexico.purplecow.org/gdamore/webrev/nopatch/

Thanks!

	- Garrett