* (bug 32376) XML export tweak to use canonical user namespaces instead of gendered...

* (bug 32376) XML export tweak to use canonical user namespaces instead of gendered ones for now

The gendered namespaces aren't listed in the <siteinfo> namespaces list, and just adding them as-is may break reader implementations.
Using the canonical form should have little effect on most activity while keeping things working.

Should resolve Lucene search problems (bug 31697) related to the Lucene search indexer not understanding the gendered namespace names.
After fix and reindex, the canonical forms should get returned and automatically transformed back into appropriate gendered forms in the search view.

[per IRC discussion check-up with Ariel about this bug and the patches on bug 30513 which cover related namespacey issues]