Log censoring

[rubdos]

Currently, the trace log contains secrets, such as the phone number and signaling password. We might want to filter these out.

@gferon We could introduce a feature = "unhygienic-logging", or we could do cfg!(debug-assertions), to still allow to log these things. What do you think? I'd vote that a debug build can contain sensitive information, while release mode should really filter and censor these crucial things.

Things to censor:

• Attachment keys
• Signaling key
• Phone numbers
• UUIDs
• public keys (identity key comes to mind)

[rubdos]

Made https://gitlab.com/whisperfish/desan