2.2.2

• Use Director::host() over direct $_SERVER access (Robbie Averill) - 09abe2b
• FIX Prevent undefined index notice when trying to determine HTTP_HOST during dev/build (Robbie Averill) - 9a7cdbb
• FIX Ensure constant is accessed correctly (Guy Marriott) - 58f8980
• Adding documentation about cascading themes (Guy Marriott) - 9feef18
• FIX Improving support for cascading themes (Guy Marriott) - 2eb04ff
• Update expected json content type in unit test (Robbie Averill) - 7d27abf
• Remove SilverStripe 4.0-4.2 from Travis builds (Robbie Averill) - 67d10ec
• FIX LeftAndMainSubsites::canAccess() now accepts a Member argument and falls back to the session member (Robbie Averill) - 4fdf2e2
• Reduce Behat builds to SS 4.3 and update postgres version (Robbie Averill) - 614819a
• Remove SilverStripe 4.0-4.2 from Travis builds (Robbie Averill) - eddbc90
• FIX LeftAndMainSubsites::canAccess() now accepts a Member argument and falls back to the session member (Robbie Averill) - 4249fff
• DOCS Fix typos (GitHub) - f650382
• Add test for URLSegment prefix set to primary subsite domain for page (Robbie Averill) - 2b26876
• Add tests and move logic into the if statement (Robbie Averill) - 900d04d
• FIX Subsites virtual pages now allow you to re-save them when used in conjunction with silverstripe-fluent (Robbie Averill) - 1f51fcd
• FIX Field labels for subsites virtual pages are no longer repeated (Robbie Averill) - c60acb3
• FIX allowed pagetypes displaying incorrectly when switching subsite (Garion Herman) - 4d7641e
• Ensure URL segment field type before using its API, and add docs around subsite and fluent domain compatibility (Robbie Averill) - 3b8207d
• Tidy output of IsPublic value in Subsites admin (Garion Herman) - 68c763d
• FIX Domains now default to "Automatic" protocol, and have the correct help description (Robbie Averill) - 1e44e1d