Shorten links to law.cornell.edu for exit-note file

The links we have currently redirect to those new files now.

changes/ticket5410

@@ -0,0 +1,3 @@
+  o Minor features:
+    - Shorten links in the tor-exit-notice file. Patch by Christian Kujau.
+

contrib/tor-exit-notice.html

@@ -87,7 +87,7 @@ seize this router will accomplish nothing.</p>
 <p>
 Furthermore, this machine also serves as a carrier of email, which means that
 its contents are further protected under the ECPA. <a
-href="http://www4.law.cornell.edu/uscode/html/uscode18/usc_sec_18_00002707----000-.html">18
+href="http://www.law.cornell.edu/uscode/text/18/2707">18
 USC 2707</a> explicitly allows for civil remedies ($1000/account
 <i><b>plus</b></i>  legal fees)
 in the event of a seizure executed without good faith or probable cause (it
@@ -105,7 +105,7 @@ used to violate the DMCA, please be aware that this machine does not host or
 contain any illegal content. Also be aware that network infrastructure
 maintainers are not liable for the type of content that passes over their
 equipment, in accordance with <a
-href="http://www4.law.cornell.edu/uscode/html/uscode17/usc_sec_17_00000512----000-.html">DMCA
+href="http://www.law.cornell.edu/uscode/text/17/512">DMCA
 "safe harbor" provisions</a>. In other words, you will have just as much luck
 sending a takedown notice to the Internet backbone providers. Please consult
 <a href="https://www.torproject.org/eff/tor-dmca-response">EFF's prepared