Fix musl build

Patch was inspired by
http://svnweb.freebsd.org/ports/head/comms/sredird/files/patch-sredird.c?revision=363168&view=markup
http://ftp.netbsd.org/pub/pkgsrc/current/pkgsrc/sysutils/sredird/patches/patch-aa
https://github.com/bitrig/bitrig-ports/blob/master/comms/sredird/patches/patch-sredird_c

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>

diff -uNr sredird-2.2.2.org/sredird.c sredird-2.2.2/sredird.c
--- sredird-2.2.2.org/sredird.c	2005-08-12 16:10:46.000000000 +0200
+++ sredird-2.2.2/sredird.c	2016-01-31 18:53:08.000000000 +0100
@@ -110,7 +110,6 @@
 #include <fcntl.h>
 #include <syslog.h>
 #include <termios.h>
-#include <termio.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netinet/ip.h>