Log Message:
Update to 4.0.6:

--- 4.0.6 2010/04/29

Fix yaz-config for static mode and the use of SSL (gnutls).

--- 4.0.5 2010/04/29

Forward decl timeval struct in mutex.h and gettimeofday.h.

yaz-config: fix 'static' mode linking.

--- 4.0.4 2010/04/28

Add functions yaz_cond_{create,destroy,wait,signal,broadcast}. These
are wrappers for pthreads or Windows. For Windows these are put in
a separate DLL: yaz_cond4.

libyaz.la (whole source) is compiled with thread. If thread support
is enabled enabled, all source of YAZ is compiled with treading support.
This allows core utilities such as yaz_log to use thread facilities.
Previously (YAZ 3 and YAZ 4 releases), only libyaz_server.la was using
thread utilities. This commit moves mutex utilities (mutex.c) from
libyaz_server.la to libyaz.la.

yaz-json-parse displays leading text until error.