[Cache] document RedisTagAwareAdapter and FilesystemTagAwareAdapter

[nicolas-grekas]

Q	A
Feature PR	symfony/symfony#33461
PR author(s)	@andrerom
Merged in	4.4

[andrerom]

Given experimental flag has been removed for 4.4 we should cover both FilesystemTagAwareAdapter and RedisTagAwareAdapter right?

Feature PR where both were introduced: symfony/symfony#30370

@nicolas-grekas ok to rename issue?

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Should cover this/these in at least components/cache/cache_invalidation.rst.
Anywhere else we should cover it?

[nicolas-grekas]

friendly ping @andrerom :)

[andrerom]

Should cover this/these in at least components/cache/cache_invalidation.rst.
Anywhere else we should cover it?

friendly reminder that question is mainly for you and doc team @nicolas-grekas ;)

[nicolas-grekas]

Should cover this/these in at least components/cache/cache_invalidation.rst.

let's start with this page yes :)