TracMercurial for 0.11: fix compatibility with Mercurial 1.3, patch from kastner_masilko@...
`ui.setconfig` is there since a long time, so the change doesn't break compatibility with older versions of Mercurial.
This closes #8460.
Authored by: cboos 2009-07-22
Parent: [r8364]
Child: [r8366]