Question/Feature Request: Supply ports from a list of file using --ports

[Azathothas]

Hi, does the --ports flag accept a ports.txt file with one port on each line? I tried:

--ports "$(cat /tmp/ports_20k.txt | grep -iv '^80$\|^443$\|^8080$\|^8443$' | sort -u | tr '\n' ',' | sed 's/,$/\n/')" 

Error:

Argument list too long