LP#1708048: mention Stretch support in upgrade doc

Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>

diff --git a/docs/installation/server_upgrade.adoc b/docs/installation/server_upgrade.adoc
index 0b75256..2cf9be3 100644 (file)
--- a/docs/installation/server_upgrade.adoc
+++ b/docs/installation/server_upgrade.adoc
@@ -6,8 +6,9 @@ All of the steps in this chapter are to be completed from the command line.
 Software Prerequisites
 ~~~~~~~~~~~~~~~~~~~~~~
 
-  * **PostgreSQL**: The minimum supported version is 9.4.
-  * **Linux**: Evergreen 3.0.beta2 has been tested on Debian Stretch (9.0),
+  * **PostgreSQL**: Version 9.4 is recommended.
+    The minimum supported version is 9.3.
+  * **Linux**: Evergreen 2.12.0 has been tested on Debian Stretch,
     Debian Jessie (8.0), Debian Wheezy (7.0), Ubuntu Xenial Xerus (16.04),
     and Ubuntu Trusty Tahr (14.04).
     If you are running an older version of these distributions, you may want