RSPRO: split ConfigClient into ConfigClientId and ConfigClientBank

The point is that the ClientId is only set once at start-up (and
also only optionally), while the Bank IP/port/ID/slot can be changed
any number of times during a RSPRO connection.

Change-Id: Ic76207c7dd7c18fe93bc5133b29c5f9438a9fb0e
diff --git a/src/rspro/ErrorString.c b/src/rspro/ErrorString.c
index 82c4700..98d0eda 100644
--- a/src/rspro/ErrorString.c
+++ b/src/rspro/ErrorString.c
@@ -4,7 +4,7 @@
  * 	found in "../../asn1/RSPRO.asn"
  */
 
-#include "ErrorString.h"
+#include <osmocom/rspro/ErrorString.h>
 
 static int check_permitted_alphabet_1(const void *sptr) {
 	/* The underlying type is IA5String */