Signup abuse detection and blocking 1.19.0

• Fix link for toggling multi-account logging on/off would generate a bad link if the user had been deleted in a report
• Fix "Users => Anti-spam" admincp group didn't show for non-superadmins
• Fix case where anti-spam admin permission was assigned but not working for non-superadmins
• Add Apple Relay detection for registration spam detection (default enable, with a score of 3)

• Fix "ticket_spam_block() error: Cannot call fastUpdate until the entity is saved" when using @Naz's Tickets

• In approval queue when showing "Shared IP with banned user" or "Shared IP with rejected user", link to the user record.
  Note; only applies to new signups
• Add "On login; Force two-step authentication if unknown ISP for user" option (default: false).
  This feature requires Password Tools v3.12.0+

• Fix XF2.1 support
• Fix missed removal of assert() usage for improve XF cloud compatibility

• Workaround Link Spam checker: Default action (by content type) option not working for new Tickets with NF/Tickets v2.10.3 and earlier

• Require StandardLib v1.22.0+
• Improve XF cloud compatibility
• Re-add XF2.1 support
• Update Country language/timezone anti-spam option example text to be explicit that is supports wildcards
• Fix 'Country language - Unknown' did not reliably apply non-zero scores
• Do not skip country language tests if the country is unknown, instead use XX as the country

• Fix rare internal server error on XF2.3 after deleting a user

• Fix pagination of on user profile multiple accounts tab
• Fix compatibility with "Login as User (LAU2)", by disabling multi-account checking when using that add-on

• Fix "manage anti-spam" admincp option didn't allow saving options when the user didn't have the "manage options" admin permission

• Fix "[E_WARNING] Attempt to read property "LogEvent" on false" when no logs are fetched for a multi-account tracking event