Retain trailing slash in reverse-proxy location entry

[CrushedPixel]

Currently, the nginx config generated by the reverse-proxy abstraction does not properly translate path settings into location entries - in my particular case, I need a trailing slash in the location entry to only match subroutes of a given path.

Expected behaviour:

path = "/api/" generates location /api/

Observed behaviour:

path = "/api/" generates location /api

I didn't check, but there could be more functionality affected by this issue (for example regexes), so the path setting should be translated into the location entry as closely as possible.

[CrushedPixel]

Fixed in 211b0a3.
Leaving this open for @qknight to think about implications of this change, for example the previous removal of double slashes in the path being disabled.