[t:4691] allow command-line (and therefore my.cnf) setting of tokudb_row_format

git-svn-id: file:///svn/mysql/tokudb-engine/tokudb-engine@41611 c7de825b-a66e-492c-adef-691d508d4ae1

storage/tokudb/hatoku_hton.cc

@@ -191,7 +191,7 @@ static TYPELIB tokudb_row_format_typelib = {
     NULL
 };
 
-static MYSQL_THDVAR_ENUM(row_format, PLUGIN_VAR_NOCMDARG,
+static MYSQL_THDVAR_ENUM(row_format, PLUGIN_VAR_OPCMDARG,
                          "Specifies the compression method for a table during this session. "
                          "Possible values are TOKUDB_UNCOMPRESSED, TOKUDB_ZLIB, TOKUDB_QUICKLZ, "
                          "TOKUDB_LZMA, TOKUDB_FAST (default), and TOKUDB_SMALL",