Please support EXT:realurl 2.x

I can´t find the module "Cache Management" under Web > Info as mentioned in https://docs.typo3.org/typo3cms/extensions/cachemgm/stable/Manual/Index.html#web-info-cache-management

Please add support for TYPO3 8.7. Some basic tests seems to work as expected.

Please elaborate what the re-cache hook does and what benefits that it gives.

From the documentation:

The cache manager also includes a re-caching hook for usage with the “crawler” extension.

Composer says:
The TYPO3 extension package "aoepeople/cachemgm", does not define an extension key in its composer.json. Please report this to the author of this package. Specifying the extension key will be mandatory in future versions of TYPO3 (see: https://docs.typo3.org/m/typo3/reference-coreapi/master/en-us/ExtensionArchitecture/ComposerJson/Index.html#extra)
There's also a check in the reports module with a complaint, and the module even suggests an updated version of composer.json.

{
    ...
    "extra": {
        "branch-alias": {
            "dev-master": "10.0.0-dev"
        },
        "typo3/cms": {
            "cms-package-dir": "{$vendor-dir}/typo3/cms",
            "web-dir": ".Build/Web",
            "extension-key": "cachemgm"
        }
    }
}

It's only a very minor issue and easily fixable. The extension works fine without the extension key (so far).