Add fields in the control file to check for whether the backend was

Add fields in the control file to check for whether the backend was
 compiled for integer date/time storage and to check the length of
 storage for the locale fields in the same data structure.
Slightly reword some of the error messages to be more accurate on
 possible recovery options (e.g. recompile *or* re-initdb).
Bump version number on this file.