Add -s (short) switch to configuration file (~/.sercprc) parsing

- ~/.sercprc may contains long option and it's parameter
example of the .sercprc file:
baud 38400
device /dev/ttyUSB0

1 files changed, 3 insertions, 0 deletions

diff --git a/sercp.c b/sercp.c
index 5eb087f..d25af14 100644
--- a/sercp.c
+++ b/sercp.c
@@ -305,6 +305,9 @@ void ParseCfg() {
 					case 'o':
 						is_old_protocol = 1;
 						break;
+					case 's':
+						is_lfn_enable = 0;
+						break;
 					default:
 						break;
 				}