I've added parsing of the V3 protocol's notice and error messages into its
various fields. This replaces the current error message format of:
SERRORC42P01Mrelation "this_table_doesnt_exist" does not
existFnamespace.cL193RRangeVarGetRelid
with the correct message and allows the programmer to retrieve the
SQLState via the standard getSQLState call.
One thing that I am concerned about is that the message fields are
separated by null bytes, but what happens when we are using an encoding
that allows embedded nulls?
Kris Jurka
