[FS#193] UCI: /etc/config/system not generated/parsed properly

[LEDE Bugs]

The following task has a new comment added:

FS#193 - UCI: /etc/config/system not generated/parsed properly
User who did this - Koen Vandeputte (xback)

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Did some more testing.

The issue synopsis can be simplified to:  UCI 'system' table is not flushed to file after generation in "config_generate"
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=193#comment510