bug#38308: INFO files changed on disk: mention rereading workaround

[Robert Pluim]

>>>>> On Thu, 21 Nov 2019 08:11:26 +0800, 積丹尼 Dan Jacobson 
>>>>> <jidanni@jidanni.org> said:

    積丹尼> (info "(info) Advanced") should add FAQ:
    積丹尼> Q: What if the info files or top directory change on disk?  Unlike
    積丹尼> normal browsers INFO has no refresh command.

    積丹尼> A: Kill the *info* buffer and start INFO again.

You donʼt have to kill the *info* buffer, you can just revert it. I do
that all the time when Iʼm writing info documentation, but I canʼt see
that being a common occurence in normal use.

Robert