Rename isNotSpecial argument to is_opaque in the parse_host

Follows: whatwg/url@9057992

README.md

@@ -3,7 +3,7 @@
 [WHATWG URL Standard](https://url.spec.whatwg.org/) compliant **U**RL **pa**rser library in C++.
 
 This library is up to date with the URL Standard published on
-[26 July 2023 (commit fff33c3)](https://url.spec.whatwg.org/commit-snapshots/fff33c343f01575c691bba6cdeeefb9d09e792a9/).
+[20 September 2023 (commit 9057992)](https://url.spec.whatwg.org/commit-snapshots/9057992dd6a050fb8af01fffb4d3c9df1ab89b70/).
 
 ## API
 

include/upa/url_host.h

@@ -45,7 +45,7 @@ class host_output {
 class host_parser {
 public:
     template <typename CharT>
-    static url_result parse_host(const CharT* first, const CharT* last, bool isNotSpecial, host_output& dest);
+    static url_result parse_host(const CharT* first, const CharT* last, bool is_opaque, host_output& dest);
 
     template <typename CharT>
     static url_result parse_opaque_host(const CharT* first, const CharT* last, host_output& dest);
@@ -141,7 +141,7 @@ static inline bool contains_forbidden_host_char(const CharT* first, const CharT*
 // https://url.spec.whatwg.org/#concept-host-parser
 
 template <typename CharT>
-inline url_result host_parser::parse_host(const CharT* first, const CharT* last, bool isNotSpecial, host_output& dest) {
+inline url_result host_parser::parse_host(const CharT* first, const CharT* last, bool is_opaque, host_output& dest) {
     using UCharT = typename std::make_unsigned<CharT>::type;
 
     // 1. Non-"file" special URL's cannot have an empty host.
@@ -154,7 +154,7 @@ inline url_result host_parser::parse_host(const CharT* first, const CharT* last,
         // set empty host
         dest.hostStart();
         dest.hostDone(HostType::Empty);
-        return isNotSpecial ? url_result::Ok : url_result::EmptyHost;
+        return is_opaque ? url_result::Ok : url_result::EmptyHost;
     }
     assert(first < last);
 
@@ -166,7 +166,7 @@ inline url_result host_parser::parse_host(const CharT* first, const CharT* last,
         return url_result::InvalidIpv6Address;
     }
 
-    if (isNotSpecial)
+    if (is_opaque)
         return parse_opaque_host(first, last, dest);
 
     // Is ASCII domain?