Update to GNU make 4.3.90

* NEWS: Add a 4.3.90 section and update Savannah bug URL
* configure.ac (AC_INIT): Change release to 4.3.90
diff --git a/NEWS b/NEWS
index e884df1..22bb456 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,6 @@
 GNU make NEWS                                               -*-indented-text-*-
   History of user-visible changes.
-  19 January 2020
+  20 January 2020
 
 See the end of this file for copyrights and conditions.
 
@@ -9,6 +9,13 @@
 See the README file and the GNU make manual for instructions for
 reporting bugs.
 
+Version 4.3.90 (20 Jan 2020)
+
+A complete list of bugs fixed in this version is available here:
+
+https://sv.gnu.org/bugs/index.php?group=make&report_id=111&fix_release_id=109&set=custom
+
+
 Version 4.3 (19 Jan 2020)
 
 A complete list of bugs fixed in this version is available here:
diff --git a/configure.ac b/configure.ac
index cd49a2c..f0315a1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,7 +16,7 @@
 # You should have received a copy of the GNU General Public License along with
 # this program.  If not, see <http://www.gnu.org/licenses/>.
 
-AC_INIT([GNU make],[4.3],[bug-make@gnu.org])
+AC_INIT([GNU make],[4.3.90],[bug-make@gnu.org])
 
 AC_PREREQ([2.69])