ncpcalls: use descriptive names for NCP wrapper functions

Rename the low-level NCP wrapper functions in ncpcall.c and net.h to include
both the NCP function/subfunction number and the operation they perform.

This keeps the numeric protocol reference visible for comparison with SDK
documentation and MARS-NWE logs, while making call sites easier to understand.
Update all callers to use the new names.

No behavior change.

slist.c

@@ -93,7 +93,7 @@ int func_slist(int argc, char *argv[], int mode)
 
   upstr(pattern);
 
-  while ((result = ncp_17_37(last_id, NCP_BINDERY_FSERVER,
+  while ((result = ncp17_37_scan_bindery_object(last_id, NCP_BINDERY_FSERVER,
                              pattern, &obj)) == 0) {
     NW_PROPERTY prop;
 
@@ -109,7 +109,7 @@ int func_slist(int argc, char *argv[], int mode)
 
     fprintf(stdout, "%-47s", obj.object_name);
 
-    if (!ncp_17_3d(NCP_BINDERY_FSERVER, obj.object_name,
+    if (!ncp17_3d_read_property_value(NCP_BINDERY_FSERVER, obj.object_name,
                    1, "NET_ADDRESS", &prop)) {
       print_net_node_status(prop.value, found == 1);
     }