Add the version-script invocation for symbol versioning to the agc-symver
branch.
First pass at adding symbol versioning for libz.

Also fix up the ZFS infrastructure where it tried to link with the
wrong libz.so instance -- these problems showed up in testing with the
versioned libz.so.
Add symbol versioning information for libterminfo.

Obvious (but interesting) aspect of this library:  ospeed, PC, and
BC also need to be exported as global symbols or they are not found
at link time.
Add versioning info for libresolv
Pull up fixes from HEAD after pdisk move to external
Add versioning information for libradius
Add versioning info for libisns
Add versioning info for libdm
Add symbol versioning info for libutil
Add versioning info for libcrypto
add versioning info for libsqlite3 and liblzma (xz)
add versioning info for libquota
add versioning info for libm
add symbol versioning info for libc
add symbol versioning information for libbz2
add symbol versioning information for libpthread
add symbol versioning info for libpthread_dbg
add the script used to generate the Version.map files
add symbol versioning info for:

	libcrypt
	libcurses
	libedit
	libmenu
	libossaudio
	libposix
	libskey
Add symbol versioning information for the following libraries:

	libbluetooth
	libbsdmalloc
	libexecinfo
	libform
	libintl
	libipsec
	libkvm
	liblwres
	libnpf
	libp2k
	libpci
	libperfuse
	libppath
	libprop
	libpuffs
	librefuse
	librpcsvc
	librt
	librumpclient
	librumphijack
	librumpuser
	libukfs
	libusbhid
	libwrap