1.1.1dev: merge from 1.0-stable (part of #10997)


git-svn-id: http://svn.edgewall.org/repos/trac/trunk@11520 af82e41b-90c4-0310-8c96-b1721e28e2e2
1.1.1dev: merged r11509 (#11017) from 1.0-stable.

git-svn-id: http://svn.edgewall.org/repos/trac/trunk@11526 af82e41b-90c4-0310-8c96-b1721e28e2e2
1.1.1dev: merged 0.12.5 related changes, from 1.0-stable branch.

git-svn-id: http://svn.edgewall.org/repos/trac/trunk@11527 af82e41b-90c4-0310-8c96-b1721e28e2e2
1.1.1dev: merge milestone cache (#10879) from 1.0-stable

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