typos in 0.10.0

[stanislavlevin]

There are typos in 0.10.0(4da5e32), which trigger the failures in test suites of projects used k5test.
For example, python-gssapi on ALTLinux fails with:

======================================================================
ERROR: test suite for <class 'gssapi.tests.test_raw.TestWrapUnwrap'>
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python3/site-packages/nose/suite.py", line 207, in run
    self.setUp()
  File "/usr/lib/python3/site-packages/nose/suite.py", line 290, in setUp
    self.setupContext(ancestor)
  File "/usr/lib/python3/site-packages/nose/suite.py", line 313, in setupContext
    try_run(context, names)
  File "/usr/lib/python3/site-packages/nose/util.py", line 471, in try_run
    return func()
  File "/usr/src/RPM/BUILD/python3-module-gssapi-1.6.14/gssapi/tests/test_raw.py", line 22, in setUpClass
    super(_GSSAPIKerberosTestCase, cls).setUpClass()
  File "/usr/lib/python3/site-packages/k5test/unit.py", line 12, in setUpClass
    cls.realm = realm.K5Realm()
  File "/usr/lib/python3/site-packages/k5test/realm.py", line 170, in __init__
    self.start_kdc()
  File "/usr/lib/python3/site-packages/k5test/realm.py", line 561, in start_kdc
    self._kdc_proc = self._start_daemon(start_args, env, 'starting...')
  File "/usr/lib/python3/site-packages/k5test/realm.py", line 362, in _start_daemon
    proc = subprocess.Popen(args, stdin=subprocess.DEVNULL, stdout=stdout,
  File "/usr/lib64/python3.9/subprocess.py", line 951, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/lib64/python3.9/subprocess.py", line 1821, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: '/usr/sbin/kdb5kdc'