int64, uint64 Types Added

Texis version 6 added the new SQL types int64 and uint64, for 64-bit signed and unsigned integers, respectively. Several functions and Vortex variables use int64 to return values in version 6: <stat> $ret.size, <sysinfo physmem>, <sysinfo freespace>, <sum "provider="odbc"> interface in Vortex supports BIGINT via int64. In version 5 and earlier these functions returned long or double values.