Eliminate unecessary logging on restore
Eliminate unecessary logging on restore

Tweak race error message by bumping severity to WARNING and note in the
message copy that the URI at one point existed but can no longer be
found.

intoximeters/wal-e,nagual13/wal-e,equa/wal-e,modulexcite/wal-e,DataDog/wal-e,fdr/wal-e,tenstartups/wal-e,heroku/wal-e,RichardKnop/wal-e,wal-e/wal-e,x86Labs/wal-e,ArtemZ/wal-e,ajmarks/wal-e