refactor: http request binding (#38971)

Better than before, still not good enough (more work can be done in the
future)

And add the missing error handling in the PrivateContext "bind"
middleware.

By the way, picked some "TrimSpace" changes from "fix: trim whitespace
from SMTP address and port - #38934" (fix #38926)

modules/private/manager.go

@@ -80,14 +80,6 @@ func SetLogSQL(ctx context.Context, on bool) ResponseExtra {
 	return requestJSONClientMsg(req, "Log SQL setting set")
 }
 
-// LoggerOptions represents the options for the add logger call
-type LoggerOptions struct {
-	Logger string
-	Writer string
-	Mode   string
-	Config map[string]any
-}
-
 // Processes return the current processes from this gitea instance
 func Processes(ctx context.Context, out io.Writer, flat, noSystem, stacktraces, json bool, cancel string) ResponseExtra {
 	reqURL := setting.LocalURL + fmt.Sprintf("api/internal/manager/processes?flat=%t&no-system=%t&stacktraces=%t&json=%t&cancel-pid=%s", flat, noSystem, stacktraces, json, url.QueryEscape(cancel))