bug#1298: allow 'emacsclient -a "emacs --daemon && emacsclient -c"'

[Stefan Monnier]

> As you well know my taste is exactly not to add such #defines.  There's
> not such #define in the daemon implementation in src, the new macro in
> undocumented, and your move was just designed as a provocation.

Please, let's calm down.

I generally agree that it's better to use "#ifdef <FEATURE>" than
"#ifdef <PLATFORM>" (tho it always depends on the specifics), so to
a large extent I prefer Juanma's code in this case.  But in any case,
when it's a question of taste, the one who wrote the code (Juanma in
this case, even if it touched the code you wrote) gets to choose.
Only ever change someone else's code when it's uncontroversial, or only
after a discussion here concluded it's better to change it.  In this
case, it's clearly controversial.


        Stefan