daemon store names can't start with a dot

> Hello Clément,

>

> Clément Lassieur <clement@lassieur.org> skribis:

>

>> Nils Gillmann <ng0@n0.is> writes:

>>

>>> Hi,

>>>

>>> Can you provide some context why this is necessary, maybe even

>>> in the commit message?

>>

>> It's necessary when you want to package a program whose source looks

>> like file:///home/foo/.bar.

>

> I’d rather not make this kind of change. In general, I think we should

> be very conservative about changes to the daemon and its protocol,

> because that’s the common denominator of all the versions of Guix.

>

> If we change something like it, then we’ll get subtle breakage depending

> on the version of the daemon in use.

>

> WDYT?

> Looks like you already closed it (or was it me?).

> Anyway, it’s certainly a limitation, but given that it’s an annoyance

> more than a showstopper (in my view at least), I’m in favor keeping

> things this way for the sake of compatibility.