Why proxies encode '+' query parameters

[Sergey Beryozkin]

"+" value also allowed in query representation, but is encoded for some
reason by UriBuilder. So there would be problems with stored in db values
if they contains "+"

I'm not using jerecy, only
org.apache.cxf.jaxrs.client.JAXRSClientFactoryBean to create proxies.

I found https://issues.apache.org/jira/browse/CXF-6015 and
"url.encode.client.parameters" property, but because
org.apache.cxf.jaxrs.client.UrlEncodingParamConverter encodes space as
"+",
and "+" is encoded as "%2B" by UriBuilder it's also not very useful
(Sequence like "+ +" would be converted to "%2B%2B%2B" and decoded as
"+++") Also it double encodes @FormParam values.