Added configure option for the IKEv1 implementation in charon.

configure.in

@@ -158,7 +158,8 @@ ARG_ENABL_SET([manager],        [enable web management console (proof of concept
 ARG_ENABL_SET([mediation],      [enable IKEv2 Mediation Extension.])
 ARG_ENABL_SET([integrity-test], [enable integrity testing of libstrongswan and plugins.])
 ARG_DISBL_SET([load-warning],   [disable the charon/pluto plugin load option warning in starter.])
-ARG_DISBL_SET([pluto],          [disable the IKEv1 keying daemon pluto.])
+ARG_ENABL_SET([pluto],          [enable the IKEv1 keying daemon pluto.])
+ARG_DISBL_SET([ikev1],          [disable IKEv1 protocol support in charon.])
 ARG_DISBL_SET([xauth],          [disable xauth plugin.])
 ARG_DISBL_SET([threads],        [disable the use of threads in pluto. Charon always uses threads.])
 ARG_DISBL_SET([adns],           [disable the use of adns in pluto (disables opportunistic encryption).])
@@ -1009,6 +1010,7 @@ AM_CONDITIONAL(USE_ME, test x$mediation = xtrue)
 AM_CONDITIONAL(USE_INTEGRITY_TEST, test x$integrity_test = xtrue)
 AM_CONDITIONAL(USE_LOAD_WARNING, test x$load_warning = xtrue)
 AM_CONDITIONAL(USE_PLUTO, test x$pluto = xtrue)
+AM_CONDITIONAL(USE_IKEV1, test x$ikev1 = xtrue)
 AM_CONDITIONAL(USE_THREADS, test x$threads = xtrue)
 AM_CONDITIONAL(USE_ADNS, test x$adns = xtrue)
 AM_CONDITIONAL(USE_CHARON, test x$charon = xtrue)
@@ -1043,7 +1045,9 @@ fi
 if test x$monolithic = xtrue; then
 	AC_DEFINE(MONOLITHIC)
 fi
-
+if test x$ikev1 = xtrue; then
+	AC_DEFINE(USE_IKEV1)
+fi
 
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