[PATCH] Fix INSTALL_DIR() to respect $DESTDIR and log

[Alexander Bokovoy]

On ti, 11 syys 2018, Martin Schwenke via samba-technical wrote:
> INSTALL_DIR() currently creates directories in their final destination,
> ignoring $DESTDIR.  Make it respect $DESTDIR and log what it is doing.
> 
> Also:
> 
> * Make CTDB use INSTALL_DIR() instead of equally broken install_dir()
> * Drop unused, broken install_dir()
> 
> Please review and maybe push...
Looks good. Pushed to autobuild with my RB+.

-- 
/ Alexander Bokovoy