Buildfarm client version 4.15 released

I have just released version 4.15 of the PostgreSQL Buildfarm Client 
<http://www.pgbuildfarm.org/downloads/releases/build-farm-4_15.tgz>.  It 
can be downloaded at 
<http://www.pgbuildfarm.org/downloads/releases/build-farm-4_15.tgz>

Here's what's changed:
 * support the new location for pg_upgrade * support running tests of client programs * support building, installing
andrunning testmodules * use a default ccache directory * improve logging when running pg_upgrade tests * handle odd
locationof Python3 regression tests * add timestamp to default log_line_prefix * make qw() errors in the config file
fatal(helps detect errors) * minor bug fixes for web script settings. * allow for using linked git directories in
non-masterbranches
 

The last item might need a little explanation.  Essentially this can 
reduce quite dramatically the amount of space required if you are 
building on more than one branch. Instead of keeping, say, 6 checked out 
repos for the current six tested branches, we keep one and link all the 
others to it. This works almost exactly the way git-new-workdir does (I 
stole the logic from there). This doesn't work in a couple of 
situations: if you are using Windows or if you are using git-reference. 
In these cases the new setting is simply ignored.

To enable this new setting in an existing installation, do the following 
after installing the new release:
 * in your config file, add this setting:   git_use_workdirs => 1, * remove the pgsql directory in each branch
directoryother than HEAD
 

Another good thing to do in existing installations would be to add "%m" 
to the beginning of the log_line_prefix setting in extra_config stanza.

Enjoy!

cheers

andrew