add basic unixsocket support

Allow to connect to a unix socket for communicating with LAPD.

Change-Id: Ia5723b09a5c68a0505829dc732def981e60a907a
diff --git a/src/Makefile.am b/src/Makefile.am
index b24f2cf..760c1f5 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -24,7 +24,8 @@
 			 input/lapd.c \
 			 input/lapd_pcap.c \
 			 input/misdn.c \
-			 input/rs232.c
+			 input/rs232.c \
+			 input/unixsocket.c
 
 libosmotrau_la_CFLAGS = $(AM_CFLAGS) $(ORTP_CFLAGS)
 libosmotrau_la_LDFLAGS = $(AM_LDFLAGS) -version-info $(TRAU_LIBVERSION)