Update package directory structure for slack 15.0

In Slackware 15.0, the package info installation directories have
changed. Almost everything moved out of /var/log, so /var/log can be
volatile, as it should have always been.

List of changes is:
* /var/log/packages -> /var/lib/pkgtools/packages
* /var/log/scripts  -> /var/lib/pkgtools/scripts
* /var/log/setup    -> /var/lib/pkgtools/setup
* /var/log/removed_packages -> /var/log/pkgtools/removed_packages
* /var/log/removed_scripts  -> /var/log/pkgtools/removed_scripts

There's also a new /var/lib/pkgtools/douninst.sh directory, but I
haven't accounted for that yet. I don't think any packages in Slackware
15.0 uses it, yet anyway.

include/pkgdb.h

@@ -32,7 +32,7 @@ These functions returns list of package names.
 G_BEGIN_DECLS
 
 /** Directory where the package database is stored. */
-#define PKGDB_DIR "var/log"
+#define PKGDB_DIR "var"
 
 #define DB_NOPEN   E(0) /**< Database is not open. */
 #define DB_OPEN    E(1) /**< Database is already open (when opening). */

src/pkgdb.c

@@ -63,8 +63,13 @@ static struct db_state _db; // yeah, this is really not uninitialized
 gint db_open(const gchar* root, gboolean readonly, struct error* e)
 {
   gchar** d;
-  gchar* checkdirs[] = { "packages", "scripts", "removed_packages",
-    "removed_scripts", "setup", NULL };
+  gchar* checkdirs[] = {
+    "lib/pkgtools/packages",
+    "lib/pkgtools/scripts",
+    "lib/pkgtools/setup",
+    "log/pkgtools/removed_packages",
+    "log/pkgtools/removed_scripts",
+    NULL };
 
   g_assert(e != NULL);
   _db.err = e;
@@ -85,8 +90,8 @@ gint db_open(const gchar* root, gboolean readonly, struct error* e)
     _db.topdir = g_strdup_printf("%s/%s%s", cwd, sane_root, PKGDB_DIR);
     g_free(cwd);
   }
-  _db.pkgdir = g_strdup_printf("%s/packages", _db.topdir);
-  _db.scrdir = g_strdup_printf("%s/scripts", _db.topdir);
+  _db.pkgdir = g_strdup_printf("%s/lib/pkgtools/packages", _db.topdir);
+  _db.scrdir = g_strdup_printf("%s/lib/pkgtools/scripts", _db.topdir);
   g_free(sane_root);
 
   /* check db dirs */
@@ -922,8 +927,8 @@ gint db_rem_pkg(gchar* name)
 
   gchar* p = g_strdup_printf("%s/%s", _db.pkgdir, name);
   gchar* s = g_strdup_printf("%s/%s", _db.scrdir, name);
-  gchar* rp = g_strdup_printf("%s/removed_packages/%s-removed-%s", _db.topdir, name, _get_date());
-  gchar* rs = g_strdup_printf("%s/removed_scripts/%s-removed-%s", _db.topdir, name, _get_date());
+  gchar* rp = g_strdup_printf("%s/log/pkgtools/removed_packages/%s-removed-%s", _db.topdir, name, _get_date());
+  gchar* rs = g_strdup_printf("%s/log/pkgtools/removed_scripts/%s-removed-%s", _db.topdir, name, _get_date());
 
   if (sys_file_type(p, 1) != SYS_REG)
   {