[#4E5888DC08259AFC8B74430592B26B8D402FF673]
Insert segments
iterator insert( iterator before, pct_string_view s);
This function inserts a segment before the specified position. Reserved characters in the segment are automatically escaped. Escapes in the segment are preserved.
All iterators that are equal to `before` or come after are invalidated.
Linear in `s.size() + this->url().encoded_resource().size()`.
Strong guarantee. Calls to allocate may throw. Exceptions thrown on invalid input.