Log Message:
GLPK 4.61 (42:0:2) has been released.

The following modules were renamed to simplify maintenance.
* src/prob.h     RENAMED            -> src/api/prob.h
* src/glpapi01.c RENAMED            -> src/api/prob1.c
* src/glpapi02.c RENAMED            -> src/api/prob2.c
* src/glpapi03.c RENAMED            -> src/api/prob3.c
* src/glpapi04.c RENAMED            -> src/api/prob4.c
* src/glpapi05.c RENAMED            -> src/api/prob5.c

* src/env/tls.c
TLS (thread local storage class specifier) option was added;
see comments in tls.c for details.

* configure.ac, config.h.in
Test for TLS was added.

* src/env/tls.c
Dll support was added.

The following modules were changed to add __cdecl specifier
for functions passed to qsort (this is needed only on compiling
GLPK with MSVC to run under MS Windows).
* src/api/cpxbas.c
* src/cglib/cfg1.c
* src/cglib/gmigen.c
* src/cglib/mirgen.c
* src/misc/wclique1.c
* src/simplex/spychuzc.c
* src/glpios10.c
* src/glpios11.c
* examples/glpsol.c

* src/glpk.h, src/env/env.c
The API routine glp_version was changed to avoid initialization
of the GLPK environment. The new API routine glp_config was
added (but not documented yet).

* INSTALL
Description of the configure option '--with-zlib' was removed.