utils/storage: cleanup

- New skipping linked list structure - possible bug in previous version
- Adjust some function names to better reflect what actually happens
- Remove redundant configurable sort elements
- Remove probe structure SSID field which is not set via BEACON, so is unreliable
- Adjust way the different fields from BEACON and PROBE reports are handled / merged
- Made client / BSSID paramater order consistent for probe / beacon functions to help avoid cut/ paste bugs
- Add RRM capability, RCPI and RSNI to client in hearing map (which is a summary of probe / beacon entries)

[cleanup commit message]
Signed-off-by: Nick Hainke <vincent@systemli.org>

src/main.c

@@ -114,7 +114,6 @@ int main(int argc, char **argv) {
     timeout_config = time_config; // TODO: Refactor...
 
     uci_get_dawn_hostapd_dir();
-    uci_get_dawn_sort_order();
 
     init_mutex();