db_register: Unlink DbPath/database, if it is not a directory
>From 884155e03bf20f1cca880f39848423091729f6cd Mon Sep 17 00:00:00 2001
From: Nagy Gabor <email@example.com>
Date: Mon, 19 Jan 2009 00:35:45 +0100
Subject: [PATCH] db_register: Unlink DbPath/database, if it is not a directory
We had a check for this case, but we didn't handle it at all (neither error,
nor fix), we also had a TODO in the code.
For example, if user has an "unstable" regular file instead of "unstable"
directory (FS#12148), from now on pacman will remove that file (and print
a warning message). Before this patch pacman just stopped with "could not
register database" error.