Needs improvement: should not duplicate the code of every request function.

Issue 0, 1, or 2 syncs as needed and do not handle 16-bit wrap until
absolutely necessary.

The installed headers can't be relying on the presence of the internal
config.h defines, and it was breaking the xcb build for me as well due to
config.h not being included early enough.

Create a macro, XCB_SEQUENCE_COMPARE, that accepts two sequence numbers and
a comparison operator and correctly handles 32-bit wrap around.
Rewrite all ordered sequence number comparisons to use this macro.
Also, caught one error where a sequence was stored in a signed int variable.
Push out a GetInputFocus request when the sequence number does wrap at 32
bits so that applications cannot see sequence 0 (as that is an error
indicator).

xcb_types.xml into xproto.xml.

Work around the unsetting of CFLAGS in src/Makefile.am, by passing CFLAGS to make via DEB_MAKE_INVOKE in debian/rules.

Stop setting DEB_CONFIGURE_EXTRA_FLAGS = --with-opt in debian/rules; cdbs does the right thing on its own, and correctly handles DEB_BUILD_OPTS.

Fix xcb_auth to use one of the new enumerations.

Add an explanation of libtool -version-info to src/Makefile.am, and add an explicit -version-info 0:0:0 for all libraries.

Fix a comment for the renaming of XCBConnSetupSuccessRep to XCBSetup, and fix another comment which had a copy-paste error.

Rename xcb-xfree86dri.pc.in to xcb-xf86dri.pc.in to match libXCBxf86dri, change its Libs line to use -lXCBxf86dri, and change configure.ac and Makefile.am accordingly.

Declare arguments const in the various structure accessors, so XCBGetSetup is not so painful to use.

Rename ConnSetup* to Setup*, Setup*Rep to Setup*, and SetupSuccess* to Setup*. Provide deprecated backwards-compatability functions and typedefs for the old names, to be removed before 1.0.

Add .pc.in files for all the new extension libraries.  Generate .pc files from the new .pc.in files in configure.ac.  Install the new .pc files in Makefile.am, and add the new .pc.in files to EXTRA_DIST.

Based on a patch by Vincent Torri.  Changes from that patch: add Requires to the .pc.in files based on the <import>s in the extensions, add a .pc.in file for libXCBxtest, change Name and Description fields to match extension names.