HTTP: Fix 2GB+ mp4/flv file downloading error.

[chundonglinlin]

Background: #2780 #2781, when distributing large files (such as flv, mp4) through HTTP service, connection timeout or overflow logs may occur.
Reason: After exceeding 2GB, the int type cannot fully represent the file size.

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TRANS_BY_GPT3

[codecov-commenter]

Codecov Report

Merging #2809 (208e2e9) into 4.0release (faf5fb0) will not change coverage.
The diff coverage is 62.96%.

@@             Coverage Diff             @@
##           4.0release    #2809   +/-   ##
===========================================
  Coverage       60.30%   60.30%           
===========================================
  Files             121      121           
  Lines           50999    50999           
===========================================
  Hits            30753    30753           
  Misses          20246    20246           

| Impacted Files | Coverage Δ | |'

Translated to English while maintaining the markdown structure:

'| Impacted Files | Coverage Δ | |
|---|---|---|
| trunk/src/protocol/srs_http_stack.hpp | 100.00% <ø> (ø) | |
| trunk/src/protocol/srs_service_http_conn.cpp | 94.37% <0.00%> (ø) | |
| trunk/src/app/srs_app_http_static.cpp | 45.79% <55.55%> (ø) | |
| trunk/src/protocol/srs_http_stack.cpp | 92.83% <70.58%> (ø) | |

'

Translated to English while maintaining the markdown structure:

'| trunk/src/protocol/srs_http_stack.hpp | 100.00% <ø> (ø) | |
| trunk/src/protocol/srs_service_http_conn.cpp | 94.37% <0.00%> (ø) | |
| trunk/src/app/srs_app_http_static.cpp | 45.79% <55.55%> (ø) | |
| trunk/src/protocol/srs_http_stack.cpp | 92.83% <70.58%> (ø) | |

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data'

Translated to English while maintaining the markdown structure:

'> Δ = absolute <relative> (impact), ø = not affected, ? = missing data

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TRANS_BY_GPT3

[winlinvip]

Please find a way to undo this modification, it should be automatically changed by the editor.

This is a significant disruption to reviewing PRs, I don't know what has been changed.

In the future, if someone wants to review this commit, it will also be very difficult, there are too many disruptions.

TRANS_BY_GPT3

[chundonglinlin]

Okay, I have made some modifications again, removing the changes that affect the review. I have also deleted the unnecessary merge commit logs using the rebase method. Thanks to Boss Yang for the PR guidance document How to File PR and Pro Git.
)

TRANS_BY_GPT3

[winlinvip]

NICE 👍