Add: Support Zstandard(zstd) savegame compression

(cherry picked from commit 6f0aeaf2c5436550c93205e704624957e9abc969)

src/crashlog.cpp

@@ -60,6 +60,9 @@
 #ifdef WITH_LIBLZMA
 #	include <lzma.h>
 #endif
+#ifdef WITH_ZSTD
+#include <zstd.h>
+#endif
 #ifdef WITH_LZO
 #include <lzo/lzo1x.h>
 #endif
@@ -292,6 +295,10 @@ char *CrashLog::LogLibraries(char *buffer, const char *last) const
 	buffer += seprintf(buffer, last, " LZMA:       %s\n", lzma_version_string());
 #endif
 
+#ifdef WITH_ZSTD
+	buffer += seprintf(buffer, last, " ZSTD:       %s\n", ZSTD_versionString());
+#endif
+
 #ifdef WITH_LZO
 	buffer += seprintf(buffer, last, " LZO:        %s\n", lzo_version_string());
 #endif