Use tvb_memeql() and tvb_memcpy().

Use tvb_memeql() and tvb_memcpy().

Use tvb_ip_to_str() and tvb_ip6_to_str().

There's no need to pass the result of tvb_get_ptr() as the 'value' in
proto_tree_add_*(): just use proto_tree_add_item().

Replace some tvb_get_ptr()s with tvb_get_ephemeral_string()s to ensure the
return string is NULL terminated.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@35546 f5534014-38df-0310-8fa8-9805f1628bb7