Back port of include change and copyright from 5.1
Makefile.am, zlib.m4:
Use separate libtool convenience library for the bundled
zlib to embed into executables and shared libraries created,
and one to install into the pkglib directory
Bug#17667: An attacker has the opportunity to bypass query logging.
This adds a new, local-only printf format specifier to our *printf functions
that allows us to print known-size buffers that must not be interpreted as
NUL-terminated "strings."
It uses this format-specifier to print to the log, thus fixing this
problem.
