Prettynice.FormData
Normal <form> elements with action="post" will have the data available at Request.formData.
It is a FormData value which is a mapping of field names to arrays of values.
You can use get to get a Maybe String of the first value associated with a
field name, or getAll to get an Array String of all values associated with the field name.
See examples/forms for the full working example.
Querying form data
Mapping of form field names to their values.
Get a Maybe String for the first value associated with a form field name.
Get an array of all the values associated with a form field name.
Parsing form data
Normally you should only need the query functions in your programs,
but if you have a string of urlencoded formdata,
you can turn it into a FormData value with fromString.
Turn a string of urlencoded form data into a FormData value.