Pick 2.5.1.1 release notes
Fake staticpages initial migration only for 2.5.0

staticpages was added as legalpages in 2.5.0, so for older releases it
is necessary to run all the staticpages migrations, but for 2.5.0 the
initial migration needs to be faked.

This allows to directly upgrade without problems from releases older than
2.5.0.