dynamic proxy per download

[milahu]

fix #3899

based on #4478 but not required here

work in progress, including some other changes like hot-reloading

[pep8speaks]

Hello @milahu! Thanks for opening this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file src/pyload/__init__.py:

Line 32:1: E265 block comment should start with '# '

• In the file src/pyload/core/__init__.py:

Line 299:9: E306 expected 1 blank line before a nested definition, found 0
Line 314:13: E265 block comment should start with '# '
Line 324:13: E306 expected 1 blank line before a nested definition, found 0
Line 335:89: E501 line too long (94 > 88 characters)
Line 337:89: E501 line too long (106 > 88 characters)

• In the file src/pyload/core/managers/plugin_manager.py:

Line 213:21: E265 block comment should start with '# '
Line 214:21: E265 block comment should start with '# '
Line 215:21: E265 block comment should start with '# '
Line 217:21: E265 block comment should start with '# '
Line 236:32: E713 test for membership should be 'not in'
Line 247:89: E501 line too long (96 > 88 characters)
Line 250:89: E501 line too long (123 > 88 characters)
Line 283:21: E265 block comment should start with '# '
Line 284:89: E501 line too long (91 > 88 characters)

• In the file src/pyload/core/network/http/aia_retry_wrap_download.py:

Line 121:89: E501 line too long (96 > 88 characters)

• In the file src/pyload/core/network/http/http_request.py:

Line 153:76: E711 comparison to None should be 'if cond is not None:'

• In the file src/pyload/plugins/addons/AntiCaptcha.py:

Line 201:89: E501 line too long (98 > 88 characters)

• In the file src/pyload/plugins/addons/ClickNLoad.py:

Line 192:89: E501 line too long (92 > 88 characters)

• In the file src/pyload/plugins/addons/TorProxy.py:

Line 31:25: E261 at least two spaces before inline comment
Line 43:13: E265 block comment should start with '# '

• In the file src/pyload/plugins/base/hoster.py:

Line 168:89: E501 line too long (98 > 88 characters)

• In the file src/pyload/plugins/base/plugin.py:

Line 14:89: E501 line too long (93 > 88 characters)
Line 59:89: E501 line too long (94 > 88 characters)

We recommend to use black to automatically correct these files.