move some variables into the octave_parser class * oct-parse.yy (fcn_comment_header): Delete unused variable. * parse.h, oct-parse.yy (current_function_depth, function_scopes, max_function_depth, parsing_subfunctions, endfunction_found, current_class_name, autoloading, fcn_file_from_relative_lookup, primary_fcn_ptr, primary_fcn_scope): Declare as member variables in the octave_parser class. Change all uses. Don't unwind_protect. (parse_fcn_file): New args, autoload and relative_lookup. Eliminate optional arguments. Change all callers. Store autoload and relative_lookup in curr_parser object.