Lack of Url Encoding

Passing parameters for the sld in the wms request results in non UrlEncoded requests.
See below for example:

Request:
/geoserver/wms?layers=who:admin2&format=image%2Fpng&service=WMS&version=1.1.1&request=GetMap&styles=&exceptions=application%2Fvnd.ogc.se_inimage&srs=EPSG%3A4326&bbox=-23.031498%2C-0.002848%2C-0.531498%2C16.976144&width=1190&height=898&sld=http%3A%2F%2Flocalhost%3A8080%2Fopenhealth-fp%2Fprototype%2Folap%2Fquery%2FDiseases%3Fcolumns%3D%5BIndicator%5D.Members%2C%5BAge%2520Group%5D.%5BAll%2520Age%2520Groups%5D%2C%5BGender%5D.%5BGender%5D.Members%26rows%3D%5BLocation%5D.%5BAll%2520Locations%5D.%5BSLP000000000000000000%5D%2C%5BDisease%5D.%5BDisease%5D.Members%2C%5BTime%5D.%5BAll%2520Times%5D%26aggregate%3D%5BAge%2BGroup%5D.%5BAge%2BGroup%5D%2C%5BLocation%5D.%5BDistrict%5D%2C%5BTime%5D.%5BMonth%5D%26filter%3D%5BIndicator%5D.%5BNumber%2520of%2520Cases%5D%2C%5BIndicator%5D.%5BNumber%2520of%2520Deaths%5D%26mapType%3Dchloropleth%26layer%3Daxis0%3A%5BIndicator%5D.%5BNumber+of+Cases%5D%2C%5BAge+Group%5D.%5BAll+Age+Groups%5D%2C%5BGender%5D.%5BAll+Genders%5D.%5BFemale%5D%2Caxis1%3A%5BLocation%5D.%5BDistrict%5D%2C%5BDisease%5D.%5BAll+Diseases%5D.%5BAFP%5D%2C%5BTime%5D.%5BAll+Times%5D%26mapType%3Dchloropleth%26flavor%3Dogc%2Fsld&transparent=true

Results in:
http://localhost:8080/openhealth-fp/prototype/olap/query/Diseases?columns=[Indicator].Members,[Age%20Group].[All%20Age%20Groups],[Gender].[Gender].Members&rows=[Location].[All%20Locations].[SLP000000000000000000],[Disease].[Disease].Members,[Time].[All%20Times]&aggregate=[Age+Group].[Age+Group],[Location].[District],[Time].[Month]&filter=[Indicator].[Number%20of%20Cases],[Indicator].[Number%20of%20Deaths]&mapType=chloropleth&layer=axis0:[Indicator].[Number of Cases],[Age Group].[All Age Groups],[Gender].[All Genders].[Female],axis1:[Location].[District],[Disease].[All Diseases].[AFP],[Time].[All Times]&mapType=chloropleth&flavor=ogc/sld