Document SStringX (differences with SString)

Author: Dutchman101

Shared/sdk/SString.h

@@ -98,6 +98,10 @@ class SString : public std::string
     void           AssignLeft(const char* szOther, uint uiMaxLength);
 };
 
+// When to use SStringX over SString:
+// - (Potential) macro conversions
+// - Trouble with implicit conversions
+// - Situations where a length parameter is needed
 class SStringX : public SString
 {
 public: