Update ns-3 version in tutorial and installation references

doc/tutorial/source/getting-started.rst

@@ -61,7 +61,7 @@ the project provides an installation guide
 for various systems, available at
 https://www.nsnam.org/docs/installation/html/index.html.
 
-As of the most recent |ns3| release (ns-3.39), the following tools
+As of the most recent |ns3| release (ns-3.40), the following tools
 are needed to get started with |ns3|:
 
 ============  ===========================================================
@@ -116,21 +116,21 @@ get a copy of a release by typing the following into your Linux shell
   $ cd
   $ mkdir workspace
   $ cd workspace
-  $ wget https://www.nsnam.org/release/ns-allinone-3.39.tar.bz2
-  $ tar xjf ns-allinone-3.39.tar.bz2
+  $ wget https://www.nsnam.org/release/ns-allinone-3.40.tar.bz2
+  $ tar xjf ns-allinone-3.40.tar.bz2
 
 Notice the use above of the ``wget`` utility, which is a command-line
 tool to fetch objects from the web; if you do not have this installed,
 you can use a browser for this step.
 
 Following these steps, if you change into the directory
-``ns-allinone-3.39``, you should see a number of files and directories
+``ns-allinone-3.40``, you should see a number of files and directories
 
 .. sourcecode:: text
 
-  $ cd ns-allinone-3.39
+  $ cd ns-allinone-3.40
   $ ls
-  bake  build.py  constants.py  netanim-3.109 ns-3.39  README.md  util.py
+  bake  build.py  constants.py  netanim-3.109 ns-3.40  README.md  util.py
 
 You are now ready to build the base |ns3| distribution and may skip ahead
 to the section on building |ns3|.
@@ -180,7 +180,7 @@ release number:
 
 .. sourcecode:: console
 
-  $ python3 download.py -n ns-3.39
+  $ python3 download.py -n ns-3.40
 
 After this step, the additional repositories of |ns3|, bake, pybindgen,
 and netanim will be downloaded to the ``ns-3-allinone`` directory.
@@ -249,9 +249,9 @@ distribution of your choice.
 
 There are a few configuration targets available:
 
-1.  ``ns-3.39``:  the code corresponding to the release
+1.  ``ns-3.40``:  the code corresponding to the release
 2.  ``ns-3-dev``:  a similar module but using the development code tree
-3.  ``ns-allinone-3.39``:  the module that includes other optional features
+3.  ``ns-allinone-3.40``:  the module that includes other optional features
     such as bake build system, netanim animator, and pybindgen
 4.  ``ns-3-allinone``:  similar to the released version of the allinone
     module, but for development code.
@@ -268,7 +268,7 @@ code either by inspection of the repository list or by going to the
 `"ns-3 Releases"
 <https://www.nsnam.org/releases>`_
 web page and clicking on the latest release link.  We'll proceed in
-this tutorial example with ``ns-3.39``.
+this tutorial example with ``ns-3.40``.
 
 We are now going to use the bake tool to pull down the various pieces of
 |ns3| you will be using.  First, we'll say a word about running bake.
@@ -297,7 +297,7 @@ Step into the workspace directory and type the following into your shell:
 
 .. sourcecode:: console
 
-  $ ./bake.py configure -e ns-allinone-3.39
+  $ ./bake.py configure -e ns-allinone-3.40
 
 Next, we'll ask bake to check whether we have enough tools to download
 various components.  Type:
@@ -347,7 +347,7 @@ should yield something like:
   >> Downloading click-ns-3.37 - OK
   >> Downloading BRITE - OK
   >> Downloading openflow-dev - OK
-  >> Downloading ns-3.39 (target directory:ns-3.39) - OK
+  >> Downloading ns-3.40 (target directory:ns-3.40) - OK
 
 The above suggests that three sources have been downloaded.  Check the
 ``source`` directory now and type ``ls``; one should see:
@@ -356,7 +356,7 @@ The above suggests that three sources have been downloaded.  Check the
 
   $ cd source
   $ ls
-  BRITE  click-ns-3.37  netanim-3.109  ns-3.39  openflow-dev
+  BRITE  click-ns-3.37  netanim-3.109  ns-3.40  openflow-dev
 
 You are now ready to build the |ns3| distribution.
 
@@ -386,7 +386,7 @@ native |ns3| build system, CMake, to be introduced later in this tutorial.
 
 If you downloaded
 using a tarball you should have a directory called something like
-``ns-allinone-3.39`` under your ``~/workspace`` directory.
+``ns-allinone-3.40`` under your ``~/workspace`` directory.
 Type the following:
 
 .. sourcecode:: console
@@ -419,7 +419,7 @@ and you should see something like:
 .. sourcecode:: text
 
   >> Building netanim-3.109 - OK
-  >> Building ns-3.39 - OK
+  >> Building ns-3.40 - OK
 
 There may be failures to build all components, but the build will proceed
 anyway if the component is optional.