is_server being true for the clients doesn't help make the protocol work :)

That's why the client couldn't connect to the server: it was using the server's
version of the protocol.

source/cl_sys_unix.c

@@ -48,6 +48,7 @@
 #include "quakedef.h"
 
 int noconinput = 0;
+qboolean	is_server = false;
 
 #define BASEDIR	"."
 

source/sv_sys_unix.c

@@ -48,6 +48,7 @@
  CVAR_FIXME */
 cvar_t	*sys_extrasleep;
 
+qboolean	is_server = true;
 qboolean	stdin_ready;
 
 #define BASEDIR	"."

source/sys_unix.c

@@ -46,8 +46,6 @@
  CVAR_FIXME */
 cvar_t	*sys_nostdout;
 
-qboolean	is_server = true;
-
 
 /* The translation table between the graphical font and plain ASCII  --KB */
 static char qfont_table[256] =