Makefile.groups: added new modules nosip and jsonrpc-s to group extra
jsonrpc-s: completed the rpc printf() api function
jsonrpc-s: removed unused variable
parser/rr: free_rr() is expecting rr_t** parameter

- give the parameter as &r, following the commit
  b40d92962b680ac29dd38ffe3c8f1aa1e39d3a97