The current supported branches and expected EoL dates are:
+———————————————————————+
| Branch | Release | Type | Release date | Estimated EoL |
|———–+————+——–+—————–+—————–|
|RELENG_6 |n/a |n/a |n/a |November 30, 2010|
|———————————————————————|
|RELENG_6_4 |6.4-RELEASE |Extended|November 18, 2008|November 30, 2010|
|———————————————————————|
|RELENG_7 |n/a |n/a |n/a |last release + 2y|
|———–+————+——–+—————–+—————–|
|RELENG_7_1 |7.1-RELEASE |Extended|January 4, 2009 |January 31, 2011 |
|———–+————+——–+—————–+—————–|
|RELENG_7_2 |7.2-RELEASE |Normal |May 4, 2009 |June 30, 2010 |
|———–+————+——–+—————–+—————–|
|RELENG_7_3 |7.3-RELEASE |Extended|March 23, 2010 |March 31, 2012 |
|———–+————+——–+—————–+—————–|
|RELENG_8 |n/a |n/a |n/a |last release + 2y|
|———–+————+——–+—————–+—————–|
|RELENG_8_0 |8.0-RELEASE |Normal |November 25, 2009|November 30, 2010|
|———–+————+——–+—————–+—————–|
|RELENG_8_1 |8.1-RELEASE |Extended|not yet |release + 2 years|
+———————————————————————+