[Content Filtering] Updates contents flags to be checked at runtime. (#1940)

* Updates contents flags to be checked at runtime.

* Fix formatting

* Add expansion flags

* Tweaks to logic

* Logic tweaks

* Update world_content_service.cpp

* Inverse DoesPassContentFiltering logic

* Update world_content_service.cpp

* Update world_content_service.cpp

Co-authored-by: Akkadius <akkadius1@gmail.com>

common/string_util.h

@@ -218,6 +218,7 @@ void SanitizeWorldServerName(char *name);
 std::string SanitizeWorldServerName(std::string server_long_name);
 std::string repeat(std::string s, int n);
 std::vector<std::string> GetBadWords();
+bool contains(std::vector<std::string> container, std::string element);
 
 template<typename InputIterator, typename OutputIterator>
 auto CleanMobName(InputIterator first, InputIterator last, OutputIterator result)