Don't package settings in bindist
Since !712 (closed) the settings
file is produced by the build system instead
of autoconf. However, this introduced a subtle bug where we would fail
to rebuild the settings
file with what we have learned from the
install-time configure
invocation. Fix this by not packaging
settings
in the bindist tarball. The build system will take care of
the rest.
Also fix a bug where the value of UseLibdw
was not being persisted to
the install time configure
.