Hope the last fix of nbackup host case insensitive cutting. Sorry.

src/utilities/nbackup/nbackup.cpp

@@ -275,10 +275,12 @@ class NBackup
 		// Recognition of local prefix allows to work with
 		// database using TCP/IP loopback while reading file locally.
 		// RS: Maybe check if host is loopback via OS functions is more correct
-		PathName db(_database), host;
-		if (ISC_extract_host(db, host, false) == ISC_PROTOCOL_TCPIP)
+		PathName db(_database), host_port;
+		if (ISC_extract_host(db, host_port, false) == ISC_PROTOCOL_TCPIP)
 		{
-			if (!host.substr(0, sizeof(localhost) -1).equalsNoCase(localhost))
+			const PathName host = host_port.substr(0, sizeof(localhost) - 1);
+			const char delim = host_port.length() >= sizeof(localhost) ? host_port[sizeof(localhost) - 1] : '/';
+			if ((delim != '/') || !host.equalsNoCase(localhost))
 				pr_error(status, "nbackup needs local access to database file");
 		}