Specified the UPGRADING.txt file is about upgrading 2.2.0 to 2.3.x and not 2.3.0 to 2.3.1 or anything else (JAMES-800)
Specified the UPGRADING.txt file is about upgrading 2.2.0 to 2.3.x and not 2.3.0 to 2.3.1 or anything else (JAMES-800)

git-svn-id: 88158f914d5603334254b4adf21dfd50ec107162@671952 13f79535-47bb-0310-9956-ffa450edef68

chibenwa/james,chibenwa/james,rouazana/james,rouazana/james,aduprat/james,chibenwa/james,aduprat/james,rouazana/james,aduprat/james,chibenwa/james,aduprat/james,rouazana/james