rc.shutdown :
Use read instead cat on file. read actually is a reliable
shell function in both ash and bash, no reason to use cat.
Use echo instead of echo -n : 2 Bytes less code that creates
1 Byte more in a save-file . read LINE <file || LINE=default
code does not work on one-line files without a trailing newline.
For now just in the block that attempts to log network transmission.