[1.0.X] Fixed #8737 -- Made the PostgreSQL version number detection more flexible.

Backport of r9931 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9933 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/postgresql/version.py

@@ -4,7 +4,12 @@ Extracts the version of the PostgreSQL server.
 
 import re
 
-VERSION_RE = re.compile(r'PostgreSQL (\d+)\.(\d+)\.')
+# This reg-exp is intentionally fairly flexible here. Require only the major
+# and minor version numbers, but need to be able to handle standard stuff like:
+#   PostgreSQL 8.3.6
+#   EnterpriseDB 8.3
+#   PostgreSQL 8.3 beta4
+VERSION_RE = re.compile(r'\S+ (\d+)\.(\d+)')
 
 def get_version(cursor):
     """