Added openconnect_set_pfs() and its JNI counterpart

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

jni.c

@@ -858,6 +858,16 @@ JNIEXPORT void JNICALL Java_org_infradead_libopenconnect_LibOpenConnect_setCertE
 	openconnect_set_cert_expiry_warning(ctx->vpninfo, arg);
 }
 
+JNIEXPORT void JNICALL Java_org_infradead_libopenconnect_LibOpenConnect_setPFS(
+	JNIEnv *jenv, jobject jobj, jint arg)
+{
+	struct libctx *ctx = getctx(jenv, jobj);
+
+	if (!ctx)
+		return;
+	openconnect_set_pfs(ctx->vpninfo, arg);
+}
+
 JNIEXPORT jint JNICALL Java_org_infradead_libopenconnect_LibOpenConnect_makeCSTPConnection(
 	JNIEnv *jenv, jobject jobj)
 {

library.c

@@ -362,6 +362,12 @@ void openconnect_set_cert_expiry_warning(struct openconnect_info *vpninfo,
 	vpninfo->cert_expire_warning = seconds;
 }
 
+void openconnect_set_pfs(struct openconnect_info *vpninfo,
+					  	unsigned val)
+{
+	vpninfo->pfs = val;
+}
+
 void openconnect_set_cancel_fd(struct openconnect_info *vpninfo, int fd)
 {
 	vpninfo->cmd_fd = fd;

openconnect.h

@@ -308,6 +308,7 @@ void openconnect_reset_ssl(struct openconnect_info *vpninfo);
 int openconnect_parse_url(struct openconnect_info *vpninfo, char *url);
 void openconnect_set_cert_expiry_warning(struct openconnect_info *vpninfo,
 					 int seconds);
+void openconnect_set_pfs(struct openconnect_info *vpninfo, unsigned val);
 
 /* If this is set, then openconnect_obtain_cookie() will abort and return
    failure if the file descriptor is readable. Typically a user may create