config.php setting to always accept internal shares

[rullzer]

Part of #18255

Setting this new setting to true basically reverts back to the pre 18 behavior by just always accepting the internal shares.

[nickvergessen]

I would instead just check the config directly in these two places:

server/lib/private/Share20/DefaultShareProvider.php

Line 150 in 5bf3d1b

$qb->setValue('accepted', $qb->createNamedParameter(IShare::STATUS_PENDING));

server/lib/private/Share20/DefaultShareProvider.php

Line 539 in 5bf3d1b

$qb = $this->dbConn->getQueryBuilder();

[ChristophWurst]

Looks good!