[InstagramBridge] Add options to reduce 429 errors
[InstagramBridge] Add options to reduce 429 errors

First option is session_id of existing Instagram account.
Second option is customizing cache timeout for InstagramBridge.

Those options can be combined.

kranack/rss-bridge,kranack/rss-bridge,ORelio/rss-bridge,kranack/rss-bridge,RSS-Bridge/rss-bridge,RSS-Bridge/rss-bridge,ORelio/rss-bridge,Riduidel/rss-bridge,Riduidel/rss-bridge,kranack/rss-bridge,ORelio/rss-bridge,RSS-Bridge/rss-bridge,Riduidel/rss-bridge