Printing maximum and minimum values of a GPhys variable.
% gpmxmn [options] path@varname[,dimname=pos1[:pos2[:thinning_intv]][,dimname=...]]
-h, --help : print this message.
2005/05/17 S Takehiro (created) 2005/07/15 S Takehiro (open_gturl method is used for opening gphys variable) 2005/08/07 S Takehiro (parse_gturl removed)