Second security vulnerability found in mail file delivery method patched in version 2.3.3.
…d in Mail 2.3.0 for sendmail or exim
…G.md (cherry picked from commit 1679aa5)
Reasons: * Markdown reads well as plain text, but can also be formatted. * It will make it easier for people to read on the web as Github formats the Markdown nicely. * It will encourage a level of consistency when people are writing CHANGELOG entries. The script used to perform the conversion is at https://gist.github.com/1339263