Research Increasing Support Forum Post Character Limit

See this post in the contributor forums for context. The tl;dr is that pastebin.m.o is slated for retirement and without another pastebin recommendation the support forums may need to support larger posts to accommodate the info copied from about:support.

My initial thoughts are that we should keep the support forum character limit and find an alternate recommendation for a pastebin. Our database is already huge and increasing the amount of data stored and served by those views doesn't seem like a good direction for us. I might even prefer that we stand up a support pastebin with auto-expiry of posts rather than recommend this content live in kitsune itself. But, I'm willing to be convinced otherwise.

All suggestions are welcome.

/cc @jgmize @metadave @jpetto @glogiotatidis

Start by reading the linked contributor forum post and reviewing the current support forum character-limit behavior. Compare the proposed options—retaining the limit with an alternate pastebin, increasing the limit, or using an auto-expiring support pastebin—and document a decided recommendation; no implementation files or tests are identified.