Fix regression with missing 500/4500/ESP rules for IPsec bound to gateway groups. Ticket #4858
Add is_array test and change !empty test to is_array test.
Fix dyndns breakage after changes on Ticket #4366
Make RRD lists global, validate graph name using whitelist of known values rather than blacklist of characters, beef up validation and escaping of related values while here. Fixes #5874 for 2.3
Fixed #5873
Remove process_alias_unzip, which never worked because of variable typo (at a minimum) and wasn't documented as an available feature so people don't expect to be able to use it.
Return false if download fails in process_alias_urltable so input validation based upon it works. Ticket #5848
Match this to max_input_vars for large aliases
Correct variable in error log
Don't try to process aliases whose downloads have failed in update_alias_url_data(). Ticket #5848
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