File locations can be customized via './configure'. 'make install'
does not work yet. Options for wizard mode and load checks may not do
what is intended.
Fun fact: there's an enlightening epigraph in the introduction to the
autoconf manual.
Advanced Rogue 5 and 7, and XRogue, now open the scorefile and logfile
at startup and then drop any set[ug]id privileges if the savedir is not
being used.
