Fix regression caused by 6e4cc3e235

Config

@@ -619,6 +619,7 @@ if [ "$REMOTEINC" = "1" ] ; then
 
 
 	INSTALLCURL="0"
+	SUGGESTCURLDIR=""
 
 	if [ -d "/usr/local/include/curl" ]; then
 		SUGGESTCURLDIR="/usr/local"
@@ -640,7 +641,7 @@ if [ "$REMOTEINC" = "1" ] ; then
 		fi
 	fi
 
-	if [ "$CURLDIR" = "$HOME/curl" -a "x$SUGGESTCURLDIR" != "x" ]; then
+	if [ "x$CURLDIR" = "x$HOME/curl" -a "x$SUGGESTCURLDIR" != "x" ]; then
 		# I guess some people will complain about this, but if system wide cURL is available
 		# and many people have old defaults then this is much preferred:
 		echo ""
@@ -651,13 +652,16 @@ if [ "$REMOTEINC" = "1" ] ; then
 	fi
 
 	if [ "x$CURLDIR" = "x" ]; then
+		CURLDIR="$SUGGESTCURLDIR"
+		# NOTE: CURLDIR may still be empty after this
+
 		# Local curl in ~/curl is used if it exists and system has no AsynchDNS
 		if [ "$GOTASYNC" != "1" -a -d "$HOME/curl" ]; then
 			CURLDIR="$HOME/curl"
 		fi
 
 		# Need to output it here, as the HOME check from above may cause this to be no longer relevant.
-		if [ "x$CURLDIR" = "x" -a "$GOTASYNC" != "1" ]; then
+		if [ "x$CURLDIR" = "x" -a "x$SUGGESTCURLDIRBAD" != "x" ]; then
 			echo "Curl library was found in $SUGGESTCURLDIRBAD, but it does not support Asynchronous DNS (not compiled with c-ares)"
 			echo "so it's of no use to us as it would stall the IRCd on REHASH."
 		fi