bankd: terminate bankd connection once map is deleted

This implements a signal based mechanism by which the main thread can
inform worker threads that their mapping has just been removed and
they should hence terminate the connection and return themselves to the
pool.

Change-Id: Id932810d59e9e5d8994629d57aaf180bc96f90f5
diff --git a/src/bankd_pcsc_slots.csv b/src/bankd_pcsc_slots.csv
index 38a22c9..32fc574 100644
--- a/src/bankd_pcsc_slots.csv
+++ b/src/bankd_pcsc_slots.csv
@@ -1,6 +1,6 @@
-"1","0","ACS ACR33 ICC Reader 00 00"
-"1","1","ACS ACR33 ICC Reader 00 01"
-"1","2","ACS ACR33 ICC Reader 00 02"
-"1","3","ACS ACR33 ICC Reader 00 03"
-"1","4","ACS ACR33 ICC Reader 00 04"
+"1","0","ACS ACR33 ICC Reader 01 00"
+"1","1","ACS ACR33 ICC Reader 01 01"
+"1","2","ACS ACR33 ICC Reader 01 02"
+"1","3","ACS ACR33 ICC Reader 01 03"
+"1","4","ACS ACR33 ICC Reader 01 04"
 "1","23","Alcor Micro AU9560 00 00"