SWIFT5: sort query items alphabetically to allow better server side caching of requests with same URL

[mbruegmann]

Currently query items in a request have random ordering that can change with every request.
For example we see

/geolocations?latitude=52.519&longitude=13.408
and
/geolocations?longitude=13.408&latitude=52.519

To allow caching based on same URLs this PR takes care of ordering the query items alphabetically.
This should not have any impact on backward compatibility, because no installation will require a random ordering.

@dydus0x14

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[wing328]

cc
@jgavris (2017/07) @ehyche (2017/08) @Edubits (2017/09) @jaz-ah (2017/09) @4brunu (2019/11) @dydus0x14 (2023/06)