Use a local copy of the PPI specification.

(Same as done on Wireshark wiki, and use revision 1.0.10 too.)

"Permission to reproduce and redistribute is granted throughout the
known universe.  You may not modify this document."

Author: infrastation

htmlsrc/linktypes/LINKTYPE_PPI.html

@@ -6,9 +6,8 @@ <h2 class="title">
             <div class="entry">
                 <h3 class="subtitle">Description</h3>
 <p>
-Packets start with a Per-Packet Information header, as specified by <a
-class=away
-href="https://web.archive.org/web/20160328114748/http://www.cacetech.com/documents/PPI%20Header%20format%201.0.7.pdf">PPI</a>,
+Packets start with a Per-Packet Information header, as specified by
+<a href="../papers/PPI_Header_format_1.0.10.pdf">PPI</a>,
 followed by a packet in the format specified by the
 <code>LINKTYPE_</code> value in the <code>pph_dlt</code> field of that
 header.

linktypes/LINKTYPE_PPI.html

@@ -50,9 +50,8 @@ <h2 class="title">
             <div class="entry">
                 <h3 class="subtitle">Description</h3>
 <p>
-Packets start with a Per-Packet Information header, as specified by <a
-class=away
-href="https://web.archive.org/web/20160328114748/http://www.cacetech.com/documents/PPI%20Header%20format%201.0.7.pdf">PPI</a>,
+Packets start with a Per-Packet Information header, as specified by
+<a href="../papers/PPI_Header_format_1.0.10.pdf">PPI</a>,
 followed by a packet in the format specified by the
 <code>LINKTYPE_</code> value in the <code>pph_dlt</code> field of that
 header.