New sub chapters for global functions linked everywhere. New API examples and clarifications. fixes #13327 fixes #12449
fixes #12834 Signed-off-by: Michael Friedrich <michael.friedrich@netways.de>
fixes #12575
Also apply a new structure. Deleted the old cluster and client documentation and started "fresh". This commit also includes various images used in the newly written "Distributed Monitoring" chapter for better understanding. fixes #12386