Fix broken links found by "make linkcheck".  scipy.org seems to be done right now, so I could not verify links going there.
diff --git a/Doc/whatsnew/2.6.rst b/Doc/whatsnew/2.6.rst
index 2cfd351..8368f6a 100644
--- a/Doc/whatsnew/2.6.rst
+++ b/Doc/whatsnew/2.6.rst
@@ -1824,7 +1824,7 @@
 
   The :mod:`bsddb.dbshelve` module now uses the highest pickling protocol
   available, instead of restricting itself to protocol 1.
-  (Contributed by W. Barnes; :issue:`1551443`.)
+  (Contributed by W. Barnes.)
 
 * The :mod:`cgi` module will now read variables from the query string
   of an HTTP POST request.  This makes it possible to use form actions
@@ -2977,7 +2977,7 @@
 * The BerkeleyDB module now has a C API object, available as
   ``bsddb.db.api``.   This object can be used by other C extensions
   that wish to use the :mod:`bsddb` module for their own purposes.
-  (Contributed by Duncan Grisby; :issue:`1551895`.)
+  (Contributed by Duncan Grisby.)
 
 * The new buffer interface, previously described in
   `the PEP 3118 section <#pep-3118-revised-buffer-protocol>`__,