Encode MultiMap with % encoding.
@param charset the charset to encode with @param equalsForNullValue if True, then an '=' is always used, even for parameters without a value. e.g. <code>"blah?a=&b=&c="</code>. @return the MultiMap as a string encoded with % encodings
See Implementation
Encode MultiMap with % encoding.
@param charset the charset to encode with @param equalsForNullValue if True, then an '=' is always used, even for parameters without a value. e.g. <code>"blah?a=&b=&c="</code>. @return the MultiMap as a string encoded with % encodings