Current implementation of captures uses the `toUrlPiece` method from the
`ToHttpApiData` typeclass, and encodes the resulting `Text` using `toEncodedUrlPiece`
when appending to the request path.
The problem with this approach is that the instance for `Text` percent-encodes
characters that are perfectly valid in URLs, such as `*`.
This patch makes direct use of `toEncodedUrlPiece`, which lets users implement
encoding according to their needs.
Closes#1511
This changes the way URL encoding for query parameters is handled,
making it possible to correctly encode arbitrary binary data into query
parameter values.
Closes#1418
