[console] Do not share ANSI escape context between lineconsole users

An ANSI escape sequence context cannot be shared between multiple
users.  Make the ANSI escape sequence context part of the line console
definition and provide individual contexts for each user.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/net/udp/syslog.c

@@ -68,10 +68,18 @@ static struct interface syslogger = INTF_INIT ( syslogger_desc );
 /** Syslog line buffer */
 static char syslog_buffer[SYSLOG_BUFSIZE];
 
+/** Syslog ANSI escape sequence handlers */
+static struct ansiesc_handler syslog_handlers[] = {
+	{ 0, NULL }
+};
+
 /** Syslog line console */
 static struct line_console syslog_line = {
 	.buffer = syslog_buffer,
 	.len = sizeof ( syslog_buffer ),
+	.ctx = {
+		.handlers = syslog_handlers,
+	},
 };
 
 /** Syslog recursion marker */