rename ipaccess-find into abisip-find

The tool is not used only to find ip.access devices, but used to find
any Abis/IP implementing devices, including those supported by OsmoBTS.
diff --git a/openbsc/src/ipaccess/Makefile.am b/openbsc/src/ipaccess/Makefile.am
index 07ab9e5..9a71529 100644
--- a/openbsc/src/ipaccess/Makefile.am
+++ b/openbsc/src/ipaccess/Makefile.am
@@ -3,15 +3,15 @@
 AM_LDFLAGS =  $(COVERAGE_LDFLAGS)
 OSMO_LIBS = $(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS) $(LIBOSMOABIS_LIBS)
 
-bin_PROGRAMS = ipaccess-find ipaccess-config ipaccess-proxy
+bin_PROGRAMS = abisip-find ipaccess-config ipaccess-proxy
 
-ipaccess_find_LDADD = $(top_builddir)/src/libbsc/libbsc.a \
+abisip_find_LDADD = $(top_builddir)/src/libbsc/libbsc.a \
 		      $(top_builddir)/src/libmsc/libmsc.a \
 		      $(top_builddir)/src/libbsc/libbsc.a \
 		      $(top_builddir)/src/libtrau/libtrau.a \
 		      $(top_builddir)/src/libcommon/libcommon.a \
 		      $(OSMO_LIBS)
-ipaccess_find_SOURCES = ipaccess-find.c
+abisip_find_SOURCES = abisip-find.c
 
 ipaccess_config_SOURCES = ipaccess-config.c ipaccess-firmware.c network_listen.c