Changes from Kevin Steves to print, in an RST segment, the payload as

Changes from Kevin Steves to print, in an RST segment, the payload as
text, as per RFC 1122:

	4.2.2.12  RST Segment: RFC-793 Section 3.4

	   A TCP SHOULD allow a received RST segment to include data.

	   DISCUSSION
		It has been suggested that a RST segment could contain
		ASCII text that encoded and explained the cause of the
		RST.  No standard has yet been established for such
		data.

as some TCP implementations (e.g., HP-UX 11.0) do that.

Clean up the code that prints the payload of non-RST segments.