function ellipk( m ) {
	return addon( m );
}
Computes the complete elliptic integral of the first kind.

@private
@param {number} m - input value
@returns {number} evaluated elliptic integral

@example
var v = ellipk( 0.5 );
// returns ~1.854

v = ellipk( 2.0 );
// returns NaN

v = ellipk( -1.0 );
// returns ~1.311

v = ellipk( Infinity );
// returns NaN

v = ellipk( -Infinity );
// returns NaN

v = ellipk( NaN );
// returns NaN