[gnome-shell] Bump version to 3.23.91

[Florian Müllner <fmuellner src gnome org>]

commit adc811ff8f60dce5936bb1b20462c50d6e8c1a79
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Mar 1 15:18:02 2017 +0100

    Bump version to 3.23.91
    
    Update NEWS.

 NEWS         |   20 ++++++++++++++++++++
 configure.ac |    4 ++--
 2 files changed, 22 insertions(+), 2 deletions(-)
---
diff --git a/NEWS b/NEWS
index 7f52311..c52b80f 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,23 @@
+3.23.91
+=======
+* Use the original timestamps for restored notifications [Florian; #766410]
+* Add weather information to date+time drop-down [Florian; #754031]
+* Refine message list layout in date+time drop-down [Florian; #775763]
+* Make next/prev media controls insensitive when unavailable [Florian; #773884]
+* Misc. bug fixes [Piotr, Bastien, Florian; #772210, #769546, #775799]
+
+Contributors:
+  Piotr Drąg, Carlos Garnacho, Florian Müllner, Bastien Nocera
+
+Translations:
+  Baurzhan Muftakhidinov [kk], Jordi Mas [ca], Ask Hjorth Larsen [da],
+  Inaki Larranaga Murgoitio [eu], Daniel Mustieles [es], Dušan Kazik [sk],
+  Aurimas Černius [lt], Jiri Grönroos [fi], Kjartan Maraas [nb],
+  Piotr Drąg [pl], Daniel Korostil [uk], Kukuh Syafaat [id],
+  Milo Casagrande [it], Fabio Tomat [fur], Rafael Fontenelle [pt_BR],
+  Fran Dieguez [gl], Мирослав Николић [sr, sr@latin], Balázs Meskó [hu],
+  Chao-Hsiung Liao [zh_TW]
+
 3.23.90
 =======
 * Handle Ctrl+Q and Ctrl+W in portal window [Bastien; #764133]
diff --git a/configure.ac b/configure.ac
index b7a5613..b2617e1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_PREREQ(2.63)
-AC_INIT([gnome-shell],[3.23.90],[https://bugzilla.gnome.org/enter_bug.cgi?product=gnome-shell],[gnome-shell])
+AC_INIT([gnome-shell],[3.23.91],[https://bugzilla.gnome.org/enter_bug.cgi?product=gnome-shell],[gnome-shell])
 AX_IS_RELEASE([git-directory])
 
 AC_CONFIG_HEADERS([config.h])
@@ -85,7 +85,7 @@ AC_MSG_RESULT($enable_systemd)
 
 GOBJECT_INTROSPECTION_MIN_VERSION=1.49.1
 GJS_MIN_VERSION=1.47.0
-MUTTER_MIN_VERSION=3.23.90
+MUTTER_MIN_VERSION=3.23.91
 GTK_MIN_VERSION=3.15.0
 GIO_MIN_VERSION=2.45.3
 LIBECAL_MIN_VERSION=3.5.3