[tlbuild] xz, wget, lz4 updates

[Nelson H. F. Beebe]

Mojca, the missing network library functions on Solaris can likely
be found by adding
	
	-lsocket -lnsl -lresolv

to a LIBS or LIB* variable in the build.  I've seen those missing
routines (bind, recv, getservbyname, ...) many times in other
package builds.

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- Nelson H. F. Beebe                    Tel: +1 801 581 5254                  -
- University of Utah                    FAX: +1 801 581 4148                  -
- Department of Mathematics, 110 LCB    Internet e-mail: beebe at math.utah.edu  -
- 155 S 1400 E RM 233                       beebe at acm.org  beebe at computer.org -
- Salt Lake City, UT 84112-0090, USA    URL: http://www.math.utah.edu/~beebe/ -
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