- Add -K keepalive flag for dropbear and dbclient

- Try to reduce the frequency of select() timeouts
- Add a max receive window size of 1MB

--HG--
extra : convert_revision : 9aa22036cb511cddb35fbc0e09ad05acb39b64d1

includes.h

@@ -56,6 +56,7 @@
 #include <ctype.h>
 #include <stdarg.h>
 #include <dirent.h>
+#include <time.h>
 
 #ifdef HAVE_UTMP_H
 #include <utmp.h>