Gracefully handle leftover single file inplace databases, fixes #2320
Gracefully handle leftover single file inplace databases, fixes #2320

Signed-off-by: Edward Z. Yang <dbd597f5635f432486c5d365e9bb585b3eaa1853@cs.stanford.edu>

headprogrammingczar/cabal,christiaanb/cabal,edsko/cabal,sopvop/cabal,themoritz/cabal,plumlife/cabal,Heather/cabal,bennofs/cabal,mightybyte/cabal,seereason/cabal,garetxe/cabal,randen/cabal,trskop/cabal,valderman/cabal,garetxe/cabal,lukexi/cabal,thoughtpolice/cabal,sopvop/cabal,Peaker/cabal,fugyk/cabal,kosmikus/cabal,mmakowski/cabal,valderman/cabal,anton-dessiatov/cabal,headprogrammingczar/cabal,corngood/cabal,martinvlk/cabal,x-y-z/cabal,mydaum/cabal,enolan/cabal,seereason/cabal,lukexi/cabal,themoritz/cabal,thomie/cabal,beni55/cabal,gbaz/cabal,mydaum/cabal,beni55/cabal,rimmington/cabal,kosmikus/cabal,Helkafen/cabal,triplepointfive/cabal,christiaanb/cabal,triplepointfive/cabal,plow-technologies/cabal,anton-dessiatov/cabal,eric-stanley/cabal,Peaker/cabal,typelead/epm,ian-ross/cabal,plow-technologies/cabal,x-y-z/cabal,fugyk/cabal,bennofs/cabal,plumlife/cabal,Heather/cabal,ghc-android/cabal,kolmodin/cabal,edsko/cabal,ghc-android/cabal,gridaphobe/cabal,kolmodin/cabal,mmakowski/cabal,thomie/cabal,thoughtpolice/cabal,sopvop/cabal,themoritz/cabal,eric-stanley/cabal,typelead/epm,gridaphobe/cabal,trskop/cabal,Helkafen/cabal,rimmington/cabal,randen/cabal,gbaz/cabal,enolan/cabal,corngood/cabal,martinvlk/cabal,ian-ross/cabal,mightybyte/cabal