this`program`is`free`software;`you`can`redistribute`it`freely\.`use`it`at`your`own`risk;`there`is`no`warranty\.`redistribution`of`modified`versions`is`permitted`provided`that`the`following`conditions`are`met:`(?:.{,20})`all`copyright`\&`permission`notices`are`preserved\.`(?:.{,20})`only`changes`required`for`packaging`or`porting`are`made\.`or`(?:.{,20})`it`is`clearly`stated`who`last`changed`the`program\.`the`program`is`renamed`or`the`version`number`is`of`the`form`x\.`y\.`z,`where`x\.`y`is`the`version`of`the`original`program`and`z`is`an`arbitrary`suffix\.