bug#34911: 26.1; doc about lock file names

[Eli Zaretskii]

> Date: Mon, 18 Mar 2019 15:47:52 -0700 (PDT)
> From: Drew Adams <drew.adams@oracle.com>
> 
> I don't see documented anywhere what a lock file name looks like.
> I looked through both the Emacs manual and the Elisp manual.  Did I miss
> it somehow, or is it defined/described nowhere?

It is described in the node "File Locks" in the ELisp manual.

> Please let users know what how lock files are named.  Thx.  If this is
> already done somewhere, please refer to that location from node (elisp)
> `File Locks'.

The node "Interlocking" in the user manual, where file locking is
described on the user level, has a cross-reference to the above node
pf ELisp manual.  So I'm unsure how you missed that.

> Please also update the doc of `dired-omit-files' to make clear that its
> default value only approximately matches auto-save files (and lock
> files?), and that even this is true only for the default naming regime
> for auto-save files.

I don't understand this part.  Concretely, what is missing in the doc
string, and why do you think it is necessary to add whatever is
missing?