resolve a list of TXT records for a hostname
fdnstxtlist will attempt to look up a list of TXT records for
If any are found, they are printed to standard output seperated by newlines and the program exits
with return code 0. If not, nothing is printed and the program exits
with return code 1.
It is impossible to determine the difference between two TXT records and one TXT record
containing a newline in the output.