error message format (filename:linenumber:column: text)

[ramsdell@... (John D. Ramsdell)]

If error messages have the format

filename:linenumber:column: text

editors, such as emacs, will bring its user to the appropriate
character in the source file identified by the error message.  If the
column is not available, the editors will go to the appropriate line
of the source file.

Please add an option for both lua and luac that specifies that errors
be reported in the above format.

John