Install git 2.4.3

Git 2.1.2 does not protect against pushes trying the '.Git/config'
attack (CVE-2014-9390). Going to 2.4.3 is perhaps a big jump but why not
use the latest? (Famous last words.)

doc/install/installation.md

@@ -88,8 +88,8 @@ Is the system packaged Git too old? Remove it and compile from source.
 
     # Download and compile from source
     cd /tmp
-    curl -L --progress https://www.kernel.org/pub/software/scm/git/git-2.1.2.tar.gz | tar xz
-    cd git-2.1.2/
+    curl -L --progress https://www.kernel.org/pub/software/scm/git/git-2.4.3.tar.gz | tar xz
+    cd git-2.4.3/
     ./configure
     make prefix=/usr/local all