ipdevpolld on FreeBSD does not work

[ingeborgoh]

NAV 5.5.2
FreeBSD 12.3
python 3.8.15

Error introduced around version 5.3(?) when epollreactor2 was added

ipdevpoll will not start:

Traceback (most recent call last):
  File "/usr/local/bin/ipdevpolld", line 19, in <module>
    from nav.ipdevpoll.epollreactor2 import install
  File "/usr/local/lib/python3.8/site-packages/nav/ipdevpoll/epollreactor2.py",
 line 24, in <module>
    from twisted.internet import epollreactor
  File "/usr/local/lib/python3.8/site-packages/twisted/internet/epollreactor.py
", line 16, in <module>
    from select import epoll, EPOLLHUP, EPOLLERR, EPOLLIN, EPOLLOUT
ImportError: cannot import name 'epoll' from 'select' 
(/usr/local/lib/python3.8/lib-dynload/select.cpython-38.so)

Solution is to remove lines 19-22 in bin/ipdevpolld

[lunkwill42]

The most likely fix for this would be to explicitly install the epollreactor2 only if the running system is Linux (it would be irrelevant elsewhere). Something similar has been done in a branch that is working on getting the test suite to pass outside of a Linux container:

https://github.com/lunkwill42/nav/blob/069273ceab21df9931859c01e26b71a568eaccf8/tests/integration/conftest.py#L35-L39