Revert "Be more liberal about what we're prepared to hash"
Revert "Be more liberal about what we're prepared to hash"

This reverts commit 0bd4a2bd15161769eae480f447ba292fd65d054b.

openspending/spendb,nathanhilbert/FPA_Core,spendb/spendb,johnjohndoe/spendb,openspending/spendb,spendb/spendb,CivicVision/datahub,nathanhilbert/FPA_Core,USStateDept/FPA_Core,CivicVision/datahub,johnjohndoe/spendb,pudo/spendb,johnjohndoe/spendb,USStateDept/FPA_Core,pudo/spendb,openspending/spendb,spendb/spendb,CivicVision/datahub,nathanhilbert/FPA_Core,USStateDept/FPA_Core,pudo/spendb