Add eNULL to ssl_cipher when -insecure

doc/w3m.1

@@ -136,7 +136,7 @@ Corresponds to dns_order=6 in configuration files
 .TP
 \fB\-insecure\fP
 use insecure SSL config options,
-alias for \f(CW-o ssl_cipher=ALL:@SECLEVEL=0 -o ssl_min_version=all
+alias for \f(CW-o ssl_cipher=ALL:eNULL:@SECLEVEL=0 -o ssl_min_version=all
 -o ssl_forbid_method= -o ssl_verify_server=0\fP
 .SS Text pager options
 .TP

main.c

@@ -757,7 +757,7 @@ main(int argc, char **argv, char **envp)
 		displayTitleTerm = argv[i] + 7;
 #ifdef USE_SSL
 	    else if (!strcmp("-insecure", argv[i])) {
-		set_param_option("ssl_cipher=ALL:@SECLEVEL=0");
+		set_param_option("ssl_cipher=ALL:eNULL:@SECLEVEL=0");
 #ifdef SSL_CTX_set_min_proto_version
 		set_param_option("ssl_min_version=all");
 #endif