net-mgmt/unifi-devel: Update to 5.10.19

While I'm here:

• Remove unifi{2-4}- from CONFLICTS - these ports no longer exist in the ports tree
• Do some spring cleaning by grouping/re-arranging some variables to their proposed blocks
• Pet portlint

Changelog:

Controller bug fixes/changes since 5.10.18:

• Fix Mongo for 32-bit non-UCK systems.
• Fix error with getting temporary cloud credentials.

Controller bug fixes/changes since 5.10.17:

• Fix database migration errors for users without guest portal configurations.

Controller bug fixes/changes since 5.10.16:

• Fix translations for zh_CN.

Controller bug fixes/changes since 5.10.15:

• Fix L3 adopt and upgrade process.
• Fix external guest portal cookies.

Controller bug fixes/changes since 5.10.12:

• Fix an issue that could prevent database migration from succeeding when upgrading from a previous version.
• Fix issue where setting SSH username and password on a UCK would fail and not notify the user.
• Fix issue when clicking Submit button for changing SSH credentials.

Controller bug fixes/changes since 5.10.11:

• Add beta badge to Auto-Optimize Network feature.
• Fix a bug when disabling Auto-Optimize Network feature.
• Various bug fixes and improvements.

https://community.ubnt.com/ubnt/attachments/ubnt/Blog_UniFi/380/2/UniFi-changelog-5.10.x.txt

PR: 235905
Submitted by: Bryce Edwards <bryce@bryce.net> (maintainer)
Approved by: miwi (mentor)
Differential Revision: https://reviews.freebsd.org/D19401