Limit Access of global posts to a maximum value

[Daniel Zoller]

Currently it is possible to download all posts of the system using the api (/api/posts?limit=LIMIT&offset=OFFSET&resourceType=RESOURCE_TYPE). Please add a restriction that only the latest 100000 posts can be downloaded. Ensure that this restriction has no effect on downloading other posts, e.g. posts of an user.

[Daniel Zoller]

added restriction to grouping all (global) to only retrieve the latest 100 000 posts/tags/users

fixes #2531

→ <<cset 593e64d196de>>