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
Only require the more recent zlibCompileFlags() when
building the server, client zlib don't need it.
Makefile.am:
Always build the bundled zlib static only
configure.in:
Look for dlopen() even if --with-mysqld-ldflags constains "-static",
as this is not the same as the flag to "ld", it just informs
"libtool" to link static with libraries created part of the build,
even if there exists shared versions.
make_binary_distribution.sh:
Real "mysqlmanager" executable might be in ".libs"
Accept any shared library for "libz", not just the static one. Bug#6584
Repetition of the corresponding change, as the 4.1 "acinclude.m4" is not used in 5.0.
