options/validate__transproxy fails on FreeBSD (thanks to the new scheduler)

Introduced in b2c56eac according to git bisect.

    sched: Remove vanilla sched options that will be going away

    - massive change to src/tgest/test_options.c since the sched options
      were added all over the place in it
    - removing the sched options caused some tests to pass/fail in new ways
      so I assumed current behavior is correct and made them pass again
       - ex: "ConnLimit must be greater" lines
       - ex: "Authoritative directory servers must" line
    - remove test_options_validate__scheduler in prep for new sched tests

And guess why it fails.

options/validate__transproxy: [forking]
  FAIL src/test/test_options.c:1129: Expected NULL but got 'ConnLimit must be greater than 0, but was set to 0'
  [validate__transproxy FAILED]