Christian Kuhn authored Aug 30, 2017 and Benni Mack committed Aug 31, 2017

The install tool brought its own "status message" class
structure since the 6.2 refactoring. This is used at many
places in the install tool for message handling.

The core has a very similar class construct "Messaging"
with only little dependencies, too. To simplify a later
separation of 'install tool' and 'installer' the internal
status message class structure is removed and transitioned
to the core Messaging structure. to get rid of just
another special thing the install tool does.

The ext:core FlashMessage and FlashMessageQueue now both
implement the \JsonSerialize interface. This allows direct
json_encode() calls on these objects, helpful for instance
for ajax responses.

In ext:install "Environment checks" suhosin specific checks
have been removed since the project is dead and only has a
pre-alpha php 7.0 fork, so probably nobody is using
that with the given core PHP constraints anymore.

Change-Id: Ifecd3cd4889d8db5aaf3e87f317c98be706ae82b
Resolves: #82257
Releases: master
Reviewed-on: https://review.typo3.org/53835


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>