Remove debug

Fix: overlong place names break migration

Fix: overlong place names break migration

Remove unused imports

Max length of place column is 120 characters

Fix: over-long place names break migration

Remove invalid values from wt_placelocation before migrating to wt_place_location

Fix: wt_placelocation data created out-of-sequence causes migration error

Fix: #3711 - the table wt_placelocation may contain duplicates

Fix: MySQL 5.7 and lower cannot CAST to FLOAT - but it can convert implicitly

Fix: #3693 - Postgres needs explicit cast from string to float

Use https link in copyright header

Fix: #3685 - orphan records in placelocation break upgrade

Fix: #2592, Fix: #2593, Fix: #3431, Fix: #3446, Fix: #3638, Fix: #3676, Merge #2652 - Refactor LocationController into request handlers