from commit ac771313eb
portidsubtype takes 1 of 2 possible keywords which do not need quoting:
configure lldp portidsubtype ifname | macaddress
The third keyword 'local' is used in the syntax when individual ports
are being defined:
configure [ports ethX [,…]] lldp portidsubtype local value
When this syntax is used, quoting is useful (see test cases for lldpd).
In the init file, the 'local' syntax is unused.
Tested on 22.03.5
Signed-off-by: Paul Donald <newtwen@gmail.com>