ICWMP: generate symlink for certificate on startup refs #15952

after the software is upgraded a new symlink needs to be created'
to the certificate that ICWMP uses for encrypted traffic

icwmp/files/etc/uci-defaults/90-icwmp-set-dhcp-reqopts

@@ -41,4 +41,14 @@ set_cwmp_reqopts() {
 	fi
 }
 
+regenerate_ssl_link(){
+	local cert_dir="/etc/ssl/certs"
+	local all_file=$(ls $cert_dir/*.pem)
+	for cfile in $all_file
+	do
+		ln -s $cfile $cert_dir/$(openssl x509 -hash -noout -in $cfile).0
+	done
+}
+
 set_cwmp_reqopts
+regenerate_ssl_link