Version 168 is out.

Hi all,

TXR 168 is out; binaries at Bintray.

Fast cycle! 20 new commits in three days.

Mostly minor things.

Significant items:

• The keepql function was discovered to be broken due to the presence of a stray duplicate statement.
• The poll function (wrapper around the POSIX poll) was not accepting streams of some kinds, like sockets.  That had a workaround: extracting the integer descriptor from the stream using fileno, and passing that in its place into poll.

 Cheers ...