Update reverse-proxies.rst

[rev111]

Corrected reverse proxying subdirectories with Caddy. Former description would not strip the subdirectory from the reverse proxy target. Changed documentation accordingly. Added an additional paragraph how stripping the subdirectory should be configured in Caddys configuration file. Source: Spent an afternoon figuring this out after unsuccesful application of this doc to a CouchDB+Caddy setup.

Overview

Corrected documentation regarding reverse proxying subdirectories with Caddy. Former description would not strip the subdirectory from the reverse proxy target as described. Changed documentation accordingly. Added an additional paragraph how stripping the subdirectory should be configured in Caddys configuration file. Source: Spent an afternoon figuring this out after unsuccesful application of this doc to a CouchDB+Caddy setup.

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Checklist

• [ ] Code is written and works correctly
• [ ] Changes are covered by tests
• [ ] Any new configurable parameters are documented in rel/overlay/etc/default.ini
• [ X] Documentation changes were made in the src/docs folder
• [ ] Documentation changes were backported (separated PR) to affected branches