build: Add example configuration for phonesim plugin

Makefile.am

@@ -233,6 +233,10 @@ builtin_sources += drivers/atmodem/atutil.h \
 if PHONESIM
 builtin_modules += phonesim
 builtin_sources += plugins/phonesim.c
+
+if DATAFILES
+conf_DATA += plugins/phonesim.conf
+endif
 endif
 
 builtin_modules += atgen
@@ -412,7 +416,7 @@ testdir = $(pkglibdir)/test
 test_SCRIPTS = $(test_scripts)
 endif
 
-conf_files = src/ofono.conf
+conf_files = src/ofono.conf plugins/phonesim.conf
 
 EXTRA_DIST = src/genbuiltin $(conf_files) $(udev_files) \
 					$(doc_files) $(test_scripts)

plugins/phonesim.conf

@@ -0,0 +1,14 @@
+# This is a sample file for the phonesim configuration
+#
+# It should be installed in your oFono system directory,
+# e.g. /etc/ofono/phonesim.conf
+#
+# Each group is parsed as a modem device
+#
+# Each group shall at least define the address and port
+#   Address = <valid IPv4 address format>
+#   Port = <valid TCP port>
+
+#[phonesim]
+#Address=127.0.0.1
+#Port=12345