Fixes in GeomFromText() to accept an new optional
   argument respobsible for SRID. This is for more
   OpenGIS conformance and PostGIS compatibility
   to simplify migrating from PgSQL to MySQL


sql/gen_lex_hash.cc:
  Changed max_allowed_array
sql/lex.h:
  Added several symbols for new OpenGIS SQL functions
sql/sql_yacc.yy:
  new OpenGIS functions (spatial constructors)