Fixes autofetch and firefox nightly fetch streams

[yurydelendik]

• Fixes fetch (Adds fetch stream logic for networking part of PDF.js #8768) and node behavior when disableAutoFetch and disableStream
• Disables fetch when ReadableStream is not available.

[yurydelendik]

/botio test

[pdfjsbot]

From: Bot.io (Windows)

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Received

Command cmd_test from @yurydelendik received. Current queue size: 0

Live output at: http://54.215.176.217:8877/0410c6fd0b76af9/output.txt

[pdfjsbot]

From: Bot.io (Linux m4)

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Received

Command cmd_test from @yurydelendik received. Current queue size: 0

Live output at: http://54.67.70.0:8877/1f315810317ce48/output.txt

[pdfjsbot]

From: Bot.io (Linux m4)

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Success

Full output at http://54.67.70.0:8877/1f315810317ce48/output.txt

Total script time: 16.51 mins

• Font tests: Passed
• Unit tests: Passed
• Regression tests: Passed

[yurydelendik]

/botio-linux preview

[pdfjsbot]

From: Bot.io (Linux m4)

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Received

Command cmd_preview from @yurydelendik received. Current queue size: 0

Live output at: http://54.67.70.0:8877/27ed1f6e2911d2a/output.txt

[pdfjsbot]

From: Bot.io (Linux m4)

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Success

Full output at http://54.67.70.0:8877/27ed1f6e2911d2a/output.txt

Total script time: 2.44 mins

Published

• Viewer: http://54.67.70.0:8877/27ed1f6e2911d2a/web/viewer.html
• Extension: http://54.67.70.0:8877/27ed1f6e2911d2a/extensions/firefox/pdf.js.xpi

[pdfjsbot]

From: Bot.io (Windows)

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Failed

Full output at http://54.215.176.217:8877/0410c6fd0b76af9/output.txt

Total script time: 29.49 mins

• Font tests: Passed
• Unit tests: Passed
• Regression tests: FAILED

Image differences available at: http://54.215.176.217:8877/0410c6fd0b76af9/reftest-analyzer.html#web=eq.log

[yurydelendik]

Trivial