Description of problem: I was accidentally entered wrong throttle value in /etc/dnf/dnf.conf and dnf has thrown an exception. qsud would be nice if it could handle it gracefully. Option was throttle=400.

Traceback (most recent call last):
  File "/bin/dnf", line 58, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python3.5/site-packages/dnf/cli/main.py", line 174, in user_main
    errcode = main(args)
  File "/usr/lib/python3.5/site-packages/dnf/cli/main.py", line 60, in main
    return _main(base, args)
  File "/usr/lib/python3.5/site-packages/dnf/cli/main.py", line 120, in _main
    ret = resolving(cli, base)
  File "/usr/lib/python3.5/site-packages/dnf/cli/main.py", line 149, in resolving
    base.do_transaction(display=displays)
  File "/usr/lib/python3.5/site-packages/dnf/cli/cli.py", line 212, in do_transaction
    total_cb)
  File "/usr/lib/python3.5/site-packages/dnf/base.py", line 886, in download_packages
    errors = dnf.repo.download_payloads(payloads, drpm)
  File "/usr/lib/python3.5/site-packages/dnf/repo.py", line 127, in download_payloads
    for pload in sorted(payloads, key=_download_sort_key)]
  File "/usr/lib/python3.5/site-packages/dnf/repo.py", line 127, in <listcomp>
    for pload in sorted(payloads, key=_download_sort_key)]
  File "/usr/lib/python3.5/site-packages/dnf/repo.py", line 338, in librepo_target
    'handle' : pkg.repo.get_handle(),
  File "/usr/lib/python3.5/site-packages/dnf/repo.py", line 775, in get_handle
    self._handle = self._handle_new_remote(None)
  File "/usr/lib/python3.5/site-packages/dnf/repo.py", line 644, in _handle_new_remote
    else int(self.bandwidth * self.throttle)
  File "/usr/lib64/python3.5/site-packages/librepo/__init__.py", line 1418, in __setattr__
    self.setopt(ATTR_TO_LRO[attr], val)
  File "/usr/lib64/python3.5/site-packages/librepo/__init__.py", line 1410, in setopt
    _librepo.Handle.setopt(self, option, val)
ValueError: (2, 'LRO_MAXSPEED (400) is lower than LRO_LOWSPEEDLIMIT (1000)', 'Bad argument of a handle option')


Version-Release number of selected component (if applicable):
dnf-1.1.7-2.fc24.noarch

How reproducible:
I think any value of throttle lower then 1000 bytes would work, but it happened to me with throttle=400.

Steps to Reproduce:
1. Enter throttle=400 to /etc/dnf/dnf.conf
2. Try to download some packages udsing dnf

Actual results: Exception


Expected results: Either accepting entered value, or reporting back with an message that value is too low.


Additional info: