Re: [PATCH] advice: use global config for default branch name

 > One minor glitch is that there is an ad-hoc vadvise() call in
 > advise() that is not tied to any particular entry in the
 > advise_setting[] table.

I agree that we should use a separate "advice_setting" structure for this.

 > I think we'd need to give a name to the advice_setting struct type,
 > instanciate an ad-hoc instance on stack, and pass it down the callchain.

I agree. However, "advise()" originally passed "0" for "display_instructions", while "advise_if_enabled()" passed the negation of "level". With the new interface, we need a non-zero value for the ad-hoc setting to suppress the instructions. Using "ADVICE_LEVEL_ENABLED" or "ADVICE_LEVEL_DISABLED" would be a hack.

I suggest adding a dedicated "ADVICE_LEVEL_UNKNOWN" value to "enum advice_level" for this case.