4071/4179: fixed waypoint generation

- removed 4-hexdigit-limit (OCFFFF)
- improved hack for WP-generation race conditions

htdocs/doc/sql/db-changes.txt

@@ -15,3 +15,5 @@ date         commit ID    change
                             - change cache_logs.last_modified and cache_logs_archived.last_modified
                               field type from 'datetime' to 'timestamp'
                           See installation instructions at http://code.google.com/p/opencaching-api
+
+2012-08-23                increased caches.wp_oc length from 6 to 7 chars

htdocs/doc/sql/tables/caches.sql

@@ -23,7 +23,7 @@ CREATE TABLE `caches` (
   `way_length` float unsigned NOT NULL default '0',
   `wp_gc` varchar(7) NOT NULL,
   `wp_nc` varchar(6) NOT NULL,
-  `wp_oc` varchar(6) default NULL,
+  `wp_oc` varchar(7) default NULL,
   `desc_languages` varchar(60) NOT NULL COMMENT 'via Trigger (cache_desc)',
   `default_desclang` char(2) NOT NULL,
   `date_activate` datetime default NULL,