MISC: Override some functions to have a better life.

- database_config_get on the number of arguments. Don't touch to
  database_config_get_text_nospace.
  - 4 for database_config_get_int
  - 5 for database_config_get_text
- lkt_uri_from on the type of the last argument
  - char ** for lkt_uri_from_list
  - char * for lkt_uri_from_single