Catch more possible SSH key parsing errors.

[m3nu]

Fixes #725

[codecov-io]

Codecov Report

Merging #789 (086086b) into master (09e9782) will decrease coverage by 2.58%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #789      +/-   ##
==========================================
- Coverage   73.57%   70.99%   -2.59%     
==========================================
  Files          53       53              
  Lines        3599     3599              
==========================================
- Hits         2648     2555      -93     
- Misses        951     1044      +93     

Impacted Files	Coverage Δ
src/vorta/utils.py	58.00% <0.00%> (-6.00%)	⬇️
src/vorta/keyring/darwin.py	0.00% <0.00%> (-92.11%)	⬇️
src/vorta/autostart.py	63.63% <0.00%> (-33.34%)	⬇️
src/vorta/network_status/darwin.py	32.75% <0.00%> (-27.59%)	⬇️
src/vorta/notifications.py	71.21% <0.00%> (-13.64%)	⬇️
src/vorta/keyring/abc.py	80.00% <0.00%> (-8.58%)	⬇️
src/vorta/network_status/abc.py	82.35% <0.00%> (-5.89%)	⬇️
src/vorta/config.py	94.44% <0.00%> (-5.56%)	⬇️
src/vorta/borg/borg_thread.py	76.66% <0.00%> (-1.67%)	⬇️
... and 1 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 09e9782...086086b. Read the comment docs.