utils: Add case-insensitive version of strpfx()

src/libstrongswan/utils/utils.h

@@ -112,6 +112,14 @@ static inline bool strncaseeq(const char *x, const char *y, size_t len)
 	return strncasecmp(x, y, len) == 0;
 }
 
+/**
+ * Helper function that checks if a string starts with a given prefix
+ */
+static inline bool strcasepfx(const char *x, const char *prefix)
+{
+	return strncaseeq(x, prefix, strlen(prefix));
+}
+
 /**
  * NULL-safe strdup variant
  */