Returns a stream with added header key: value. This function does not remove an existing header with that key.
add-mime-header(s:stream, key:string, value:string) -> stream  | 
Name  | 
Type  | 
Description  | 
|---|---|---|
s  | 
stream  | 
The stream to which the header should be added.  | 
key  | 
string  | 
The key from the key-value pair.  | 
value  | 
string  | 
The value from the key-value pair.  |