Move tree comparison to t/compare-trees; compare content by default.

Signed-off-by: Rob Browning <rlb@defaultvalue.org>
Reviewed-by: Zoran Zaric <zz@zoranzaric.de>
Don't pass -AX to rsync in t/compare-trees if xattrs aren't supported.

The -AX options won't be available if rsync doesn't report the xattr
capability, so test for that before trying to use them.

Thanks to Yung-Chin Oei <yungchin@yungchin.nl> for the suggested
approach and initial report.

Signed-off-by: Rob Browning <rlb@defaultvalue.org>
Reviewed-by: Zoran Zaric <zz@zoranzaric.de>
Don't pass --tmpdir to mktemp or expect it to have a default template.

BSD mktemp does not understand --tmpdir, and does not have a default
pattern if none is supplied.

Signed-off-by: Yung-Chin Oei <yungchin@yungchin.nl>
Acked-by: Gabriel Filion <lelutin@gmail.com>
Reviewed-by: Rob Browning <rlb@defaultvalue.org>
Avoid partial writes of config/config.h.

Write to config/config.h.tmp first, then rename it to config/config.h
once it's complete to avoid the possibility of a partially written
file.

Thanks to Paul Schulz <pschulz01@gmail.com> for reporting the problem.

Signed-off-by: Rob Browning <rlb@defaultvalue.org>
Reviewed-by: Zoran Zaric <zz@zoranzaric.de>