Allow default content disposition to be overridden
Remove redundant fallback
Improve inline documentation
EZP-21156 : clear cache in another transaction
Fix EZP-21510: Performance in ClearViewCacheSubtree content action.
Fix EZP-21547: headers not sent for cached errors

The headers are added to the module result, and stored
in cache. They are then sent to the browser when rendering
the result, cached or not.
EZP-21547: re-added the header call from error/view

The headers might be required since errors don't always
happen from content/view
Merge pull request #756 from joaoinacio/ezp-21510-deleteviewcache

Implement EZP-21510: Performance in ClearViewCacheSubtree content action
Fixed typos
EZP-21190: Removed workaround since fix has beed merged in ZetaComponent Archive

https://github.com/zetacomponents/Archive/commit/d0caff8e162ecb755efa30f23b7a3f63c114cdf9
Fixed EZP-21324: Images for original object lost when editing copies
Fixed EZP-21444: SQL query error in fetch('content',  'keyword') with some 'sort_by' parameters
fix EZP21591: querystring lost in redirection
Implement EZP-21493: content fetch keyword filtered by subtree
Merge pull request #744 from ezsystems/21493_fetch_keyword_depth

Implement EZP-21493: content fetch keyword filtered by subtree
Merge pull request #764 from pborreli/typos

Fixed typos
Merge branch 'master' of github.com:ezsystems/ezpublish-legacy
Fix EZP-21438: use also view_embed permission for relations
(cherry picked from commit 6f5490857212103c297bccb99202871b8cc1417c)
Fix EZP-21438: additional permission checking for relations
(cherry picked from commit 5eb5b0728c8fbf1da8eba62a26e3103ab7209124)
Merge pull request #614 from peterkeung/default-content-disposition

Fix for EZP-20741: Allow default content disposition to be overridden