Log Message:
Update py-moin to 1.9.10, the last 1.x release.

Patch from Patrick TJ McPhee via pkgsrc-users.

Changes are documented at

https://github.com/moinwiki/moin-1.9/blob/1.9.10/docs/CHANGES#L13

There are too many to list here, but the summary is
 - upgrades to included third-party-packages,
 - wide array of security fixes
 - improvements in user management