Update starship URLs.

Doc/ext/ext.tex

@@ -1759,7 +1759,7 @@ Create a \file{Setup} file for your extension module, as described in
 Chapter \ref{building-on-unix}.
 
 Get David Ascher's \file{compile.py} script from
-\url{http://starship.skyport.net/~da/compile/}.  Run the script to
+\url{http://starship.python.net/crew/da/compile/}.  Run the script to
 create Microsoft Visual \Cpp{} project files.
 
 Open the DSW file in V\Cpp{} and select \strong{Build}.

Doc/lib/libcrypto.tex

@@ -13,7 +13,7 @@ written by Andrew Kuchling of further interest; the package adds
 built-in modules for DES and IDEA encryption, provides a Python module
 for reading and decrypting PGP files, and then some.  These modules
 are not distributed with Python but available separately.  See the URL
-\url{http://starship.skyport.net/crew/amk/python/crypto.html} or
+\url{http://starship.python.net/crew/amk/python/crypto.html} or
 send email to \email{akuchlin@acm.org} for more information.
 \index{PGP}
 \index{Pretty Good Privacy}

Doc/tut/tut.tex

@@ -3586,9 +3586,9 @@ code, documentation, and pointers to Python-related pages around the
 Web.  This web site is mirrored in various places around the
 world, such as Europe, Japan, and Australia; a mirror may be faster
 than the main site, depending on your geographical location.  A more
-informal site is \url{http://starship.skyport.net}, which contains a
+informal site is \url{http://starship.python.net/}, which contains a
 bunch of Python-related personal home pages; many people have
-downloadable software here.
+downloadable software there.
 
 For Python-related questions and problem reports, you can post to the
 newsgroup \newsgroup{comp.lang.python}, or send them to the mailing