by running this command:
git ls-files -z | xargs -0 perl -pi -0777 -e 's/\n\n+$/\n/'
This is in preparation for a more strict make syntax-check
rule that will detect trailing blank lines.

        Avoid risk of format string abuse (also avoids gcc warnings).
        * src/util.c (ReportError): Use a literal "%s" format string.
        * src/remote_internal.c (server_error): Likewise.
        * src/qemu_conf.c (qemudReportError): Likewise.
        * acinclude.m4: Add -Wformat -Wformat-security to default
          list of warning flags, to warn about errors such as the
          above.

        * acinclude.m4, configure.in: ./configure option
          --disable-stack-protector.
        * src/gnutls_1_0_compat.h: Compatibility with GnuTLS 1.0.
        * src/bridge.c: If no bridge ioctls, give an error at runtime.

  user specified CFLAGS
Daniel

        * acinclude.m4: add LIBVIRT_COMPILE_WARNINGS, copied from
        GNOME but with a few more flags we'd been using.

        * configure.in: use that instead of setting CFLAGS
        directly.

        * proxy/Makefile.am, python/Makefile.am, qemud/Makefile.am,
          src/Makefile.am, tests/Makefile.am: use $(WARN_CFLAGS)