Choosing good keywords for tickets

Trac can search the full text of tickets, so adding a keyword that already occurs in another field doesn't help for general searching. If we standardise the use of certain keywords, however, it could make finding certain specific types of ticket much easier. This, then, is a suggested list of keywords that we might like to standardise.

Keyword	Meaning
tiger leopard snowleopard lion mountainlion mavericks	The ticket is only applicable to the indicated OS release(s).
i386 x86_64 ppc ppc64	The ticket is only applicable when using the indicated build_arch.
LP64	The ticket describes a problem caused by the size of variables of type int, long or pointers on a 64-bit arch.