Resolve Overpass API requests to a specific IP address

[gboeing]

Fixes #698 when making Overpass requests by resolving a URL to its IP address then forcing socket.getaddrinfo to use that IP address instead of the host under the hood of the requests library. Works for http and https requests.

[codecov]

Codecov Report

Merging #699 (1fe0695) into main (47eda7d) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #699      +/-   ##
==========================================
- Coverage   97.09%   97.08%   -0.02%     
==========================================
  Files          24       24              
  Lines        2376     2399      +23     
==========================================
+ Hits         2307     2329      +22     
- Misses         69       70       +1     

Impacted Files	Coverage Δ
osmnx/downloader.py	96.66% <100.00%> (-0.28%)	⬇️
osmnx/settings.py	100.00% <100.00%> (ø)
osmnx/_api.py	100.00% <0.00%> (ø)
osmnx/plot.py	96.69% <0.00%> (+0.04%)	⬆️

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[jslorrma]

Fixes #698 when making Overpass requests by resolving a URL to its IP address then forcing socket.getaddrinfo to use that IP address instead of the host under the hood of the requests library. Works for http and https requests.

This pull request breaks any download in case proxies are or have to be used, e.g. if one is using osmnx from within a corporate network. socket.gethostbyname can only resolve the URL's domain to an IP address for hosts within the corporate network. Trying to resolve an external URL raises the following error: gaierror: [Errno 11001] getaddrinfo failed