Added support for gzip accepted_encoding in scgi headers.

src/utils/gzip.h

@@ -0,0 +1,12 @@
+#ifndef RTORRENT_UTILS_GZIP_H
+#define RTORRENT_UTILS_GZIP_H
+
+#include <functional>
+
+namespace utils {
+
+void gzip_compress_to_vector(const char* buffer, unsigned int length, std::vector<char>& output, unsigned int offset = 0);
+
+} // namespace utils
+
+#endif