User-script to escape utf8mb4 Unicode before saving to work around database issue

[bkil]

Please review:

• User:Bkil/user-script/utf8mb4-to-entity.js - OpenStreetMap Wiki

If you like it, here’s an example how you can install it:

• User:Bkil/common.js - OpenStreetMap Wiki

[bkil]

This is a mitigation to the issue:

• standard UTF8 encoding for MediaWiki databases · Issue #373 · openstreetmap/operations · GitHub