Import "telent" clx

This is an import from https://github.com/sharplispers/clx, revision
6e39a0d, unchanged.

git describe --tags says:
0.7.4-19-g6e39a0d

Not yet tested with cmucl.
2 jobs from upstream-clx in 16 minutes and 25 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #1215
linux
linux-runner

00:16:25

passed #1216
osx
osx-runner

00:07:18

 
Name Stage Failure
failed
linux-runner Test There is an unknown failure, please try again
99.999% of the tests passed

Failed tests: (ISSUES-TESTS::ISSUE.41.1)
| Failed Form: (PROCESS-STATUS ISSUES-TESTS::P)
| Expected :CONTINUED but saw :EXITED
|
ISSUE.41.1: 5 assertions passed, 1 failed.

ERROR: Job failed: exit code 1