Experimental Rlogin support, thanks to Delian Delchev. Local flow

control is unsupported, and server-to-client comms may fail for want
of working TCP Urgent.

[originally from svn r875]

be_all.c

@@ -10,6 +10,7 @@
 struct backend_list backends[] = {
     {PROT_SSH, "ssh", &ssh_backend},
     {PROT_TELNET, "telnet", &telnet_backend},
+    {PROT_RLOGIN, "rlogin", &rlogin_backend},
     {PROT_RAW, "raw", &raw_backend},
     {0, NULL}
 };