* Renamed startup_db_reset -> xmldb_db_reset (its a general function)
* In startup_extraxml(), check if reset callbacks or extraxml file actually makes and changes to the tmp db.
* also renamed `xml_insert` to `xml_wrap_all`.
* Added `clicon_argv_get()` function to get the user command-line options, ie the args in `-- <args>`. This is an alternative to using them passed to `plugin_start()`.