Add some log lines for SFTP logins, non-filebase file transfers

Q for Deuce: record_transfer() is being called multiple times for non-filebase
file transfers, resulting in duplicate log messages. This doesn't happen for
filebase file transfer (downloads, anyway).

src/sbbs3/answer.cpp

@@ -444,6 +444,9 @@ bool sbbs_t::answer()
 								SAFECOPY(useron.comp, client_name);
 								useron.logons++;
 								putuserdat(&cfg,&useron);
+								snprintf(str, sizeof(str), "(%04u)  %-25s  %s Logon"
+									,useron.number, useron.alias, client.protocol);
+								logline("++", str);
 							}
 							else {
 								lprintf(LOG_NOTICE, "%04d Trying to create new user over sftp, disconnecting.", client_socket);

src/sbbs3/sftp.cpp

@@ -1177,8 +1177,12 @@ copy_path_from_dir(char *p, const char *fp)
 static void
 record_transfer(sbbs_t *sbbs, sftp_filedescriptor_t desc, bool upload)
 {
-	if (desc->dir == -1)
+	if (desc->dir == -1) {
+		char str[MAX_PATH + 1];
+		snprintf(str, sizeof str, "%s (%" PRId64 " bytes)", desc->local_path, flength(desc->local_path));
+		sbbs->logline(upload ? "U+" : "D-", str);
 		return;
+	}
 	char *nptr = strrchr(desc->local_path, '/');
 	if (nptr != nullptr) {
 		file_t file{};