verifying libreadline usage

We had replaced libreadline with libeditline in #27 (closed)

But it looks like we are still using it.

In cli_wallet when libreadline.so8 was missing. The error was fixed by doing ln -s libreadline.so8 -> libreadline.so7

.programs/cli_wallet/cli_wallet: error while loading shared libraries: libreadline.so.8: cannot open shared object file: No such file or directory

thanking @cryptosig for bringing this up.