Include source capabilities in source specs list

api/source_specs.go

@@ -56,6 +56,7 @@ func getSourceSpecs(_ *config.Options, p httprouter.Params, body io.Reader) Resp
 
 	ret := map[string]sources.SourceInfos{}
 	for k, src := range *srcs {
+		src.Infos.Capabilities = sources.GetSourceCapabilities(src.Creator())
 		ret[k] = src.Infos
 	}
 

sources/interface.go

@@ -46,6 +46,9 @@ type SourceInfos struct {
 
 	// Description is a brief description of what the source is.
 	Description string `json:"description"`
+
+	// Capabilites is a list of special ability of the source (automatically filled).
+	Capabilities []string `json:"capabilities,omitempty"`
 }
 
 // ListDomainsSource are functions to declare when we can retrives a list of managable domains from the given Source.