Log Message:
Updated net/yaz 4.1.6 to 5.16
------------------------------
--- 5.16.0 2016/04/29
Allow multi-byte indicators for MARC subsystem. GitHub #11.

--- 5.15.3 2016/04/06
Fix yaz_query2xml aborts for attribute type 0. GitHub #9.

backtrace: exit with same signal as original fired
Until now with backtrace any signal would end up being an SIGABRT.

backtrace: cancel alarm if backtrace succeeds
This is to avoid "backtrace hangs" message that should not be
printed and gdb be invoked twice.

Fix some broken URLs in documentation and code.

yaz_marc_write_iso2709: truncate if 99,999 limit is reached.

--- 5.15.2 2016/01/11
Re-organize Windows build. Use ICU compiled with VS 2015 to use
same runtime as rest of components (YAZ, Libxml2, etc).

Move YAZ and many other software components to GitHub.

--- 5.15.1 2015/11/12
Bundle sha1 rather than use libgcrypt/nettle. This means that
configure no longer accepts --with-gcrypt and --with-nettle.

Fix rpn2cql fails for Bib-1 set in qry+conf YAZ-865

--- 5.15.0 2015/11/11
CCL: fix r=o, r=r WRT inherited attributes YAZ-864

(more 1400 lines are listed in NEWS, omitted)

(pkgsrc changes)
 - Add following line to find backtrace and backtrace_symbols
   # backtrace and backtrace_symbols
   LDFLAGS+=      -lexecinfo