Small rings can have STEREOANY/EITHERDOUBLE bonds

[ricrogz]

We don't allow bond stereo in rings smaller than 8 atoms, but we do allow STEREOANY/EITHERDOUBLE, which doesn't make much sense to me:

In [1]: from rdkit import Chem 
   ...:  
   ...: m = Chem.MolFromMolBlock(""" 
   ...:   MJ201500                       
   ...:  
   ...:   9  9  0  0  0  0  0  0  0  0999 V2000 
   ...:    -5.9375    1.9076    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0 
   ...:    -6.6519    1.4951    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0 
   ...:    -5.2230    1.4951    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0 
   ...:    -5.9375    2.7326    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0 
   ...:    -6.6519    0.6700    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0 
   ...:    -7.3664    1.9076    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0 
   ...:    -5.2230    0.6700    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0 
   ...:    -5.9375    0.2575    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0 
   ...:    -4.5085    0.2575    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0 
   ...:   1  2  2  3  0  0  0 
   ...:   3  1  1  0  0  0  0 
   ...:   1  4  1  0  0  0  0 
   ...:   2  5  1  0  0  0  0 
   ...:   2  6  1  0  0  0  0 
   ...:   7  3  2  3  0  0  0 
   ...:   5  8  2  3  0  0  0 
   ...:   8  7  1  0  0  0  0 
   ...:   7  9  1  0  0  0  0 
   ...: M  END 
   ...: $$$$ 
   ...: """) 
   ...:  
   ...: print(Chem.MolToMolBlock(m))                                                                                                                                                

     RDKit          2D

  9  9  0  0  0  0  0  0  0  0999 V2000
   -5.9375    1.9076    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -6.6519    1.4951    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -5.2230    1.4951    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -5.9375    2.7326    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -6.6519    0.6700    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -7.3664    1.9076    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -5.2230    0.6700    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -5.9375    0.2575    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.5085    0.2575    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  2  3
  3  1  1  0
  1  4  1  0
  2  5  1  0
  2  6  1  0
  7  3  2  3
  5  8  2  3
  8  7  1  0
  7  9  1  0
M  END

This is happening in current master.