wrap long lines, remove (very old) attribution from code

/*

 * Transfer()

 *

 * This function is what performs the actual transfer. It is capable of

 * doing both ways simultaneously.

 * The transfer must already have been setup by a call to Curl_setup_transfer().

 * This function is what performs the actual transfer. It is capable of doing

 * both ways simultaneously.  The transfer must already have been setup by a

 * call to Curl_setup_transfer().

 *

 * Note that headers are created in a preallocated buffer of a default size.

 * That buffer can be enlarged on demand, but it is never shrunken again.

 *

 * Parts of this function was once written by the friendly Mark Butler

 * <butlerm@xmission.com>.

 */

static CURLcode