* Fix for r81960: List the local magic word synonyms first, so that they will be...

* Fix for r81960: List the local magic word synonyms first, so that they will be returned by $magic->getSynonym( 0 ). Apply array_values() to fix up the keys, potentially corrupted by array_unique().
* In MagicWord::initRegex(), put the longest synonyms first in the alternation. This means that when one synonym is an initial substring of another, the longest one will match in precedence, which is generally in line with user expectations.