Edge: fix origin fail for missing or incomplete params.

[chundonglinlin]

1. Background

When setting up edge nodes for origin retrieval mode, sometimes the origin server requires authentication parameters for validation. If a playback request reaches the edge and triggers origin retrieval without these parameters, it can result in playback failure.

2. Configuration

Configuration file:

listen              1935;
max_connections     1000;
pid                 objs/edge.pid;
daemon              off;
srs_log_tank        console;
http_server {
    enabled         on;
    listen          8080;
    dir             ./objs/nginx/html;
}
vhost __defaultVhost__ {
    cluster {
        mode            remote;
        origin          127.0.0.1:19350;
    }
    http_remux {
        enabled     on;
        mount       [vhost]/[app]/[stream].flv;
    }
}

3. Playback Request

Format 1

ffplay -v debug "rtmp://127.0.0.1/live?secret=84af974ae64b2e1d&time=3C5DA3FA7/livestream"

Format 2

ffplay -v debug "rtmp://127.0.0.1/live?secret=84af974ae64b2e1d/livestream?time=3C5DA3FA7"

Format 3

ffplay -v debug "rtmp://127.0.0.1/live/livestream?secret=84af974ae64b2e1d&time=3C5DA3FA7"

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TRANS_BY_GPT4

[duiniuluantanqin]

Add some unit tests.

TRANS_BY_GPT4

[winlinvip]

As we are going to support new edge cluster, the Relay mode, so I'd like to close this PR for edge.