Replace hardwired FS dirs with configure defines.

tbsetup/exports_setup.in

@@ -19,15 +19,15 @@ my $TB		= "@prefix@";
 my $TBOPS       = "@TBOPSEMAIL@";
 my $TESTMODE    = @TESTMODE@;
 my $FSNODE      = "@FSNODE@";
+my $projdir     = "@FSDIR_PROJ@";
+my $usersdir    = "@FSDIR_USERS@";
+my $groupdir    = "@FSDIR_GROUPS@";
 
 # Note no -n option. We redirect stdin from the new exports file below.
 my $SSH		= "$TB/bin/sshtb -l root $FSNODE";
 my $PROG	= "/usr/testbed/sbin/exports_setup.proxy";
 my $exportstail = "/var/tmp/exports.tail";
 my $lockfile    = "/var/tmp/testbed_exports_lockfile";
-my $projdir     = "/q/proj";
-my $usersdir    = "/users";
-my $groupdir    = "/q/groups";
 my $dbg		= 1;
 my @row;