by xjm: Rename _taxonomy_access_format_grant_record() to _taxonomy_access_format_node_access_record() for clarity.

by xjm: Reduce memory overhead of affected nodes cache (do not cache duplicates and stop caching if there are more nodes than the max threshold).

Issue #1243284 by xjm: Autocomplete field access incorrectly set to FALSE if the field has unlimited values.

Issue #1242716 by xjm: $element['#value'] may be either an array or a scalar in taxonomy_access_options_validate().

by xjm: Checking for empty array with single ID returns when it is zero (global default), which breaks default grant updates.

Issue #1213792 by xjm: Accept either single values or arrays in multiple-value API, and remove single-value wrappers.

Issue #1237054 by xjm: Workaround for user validation since user profile form neglects to include the uid.