zypper-fsearch: allow to override solvfiledir via zypp.conf

tools/zypper-fsearch

@@ -2,7 +2,13 @@
 use strict;
 
 my $pattern=shift;
-chdir("/var/cache/zypp/solv") or die;
+my $solvdir="/var/cache/zypp/solv";
+open(my $cnf, "/etc/zypp/zypp.conf") or die "zypp.conf: $!";
+while(<$cnf>) {
+  if(m/^cachedir = (.*)/) {$solvdir="$1/solv"}
+  if(m/^solvfilesdir = (.*)/) {$solvdir=$1}
+}
+chdir($solvdir) or die;
 my @idx=<*/solv.idx> or die "no solv.idx files";
 open(my $pipe, "-|", "grep", "--with-filename", "--", $pattern, @idx) or die $!;