[phobos] std.process deprecations

[Lars Tandle Kyllingstad via phobos]

Hi,

Functions from the old std.process have been marked (in documentation) 
as "scheduled for deprecation" since April 2013.  I'm not completely 
clear on the deprecation process we're currently using.  Is it OK to 
finally add a "deprecated" attribute to them now?  I am currently doing 
some maintenance work on std.process, and this seems like a good time to 
do it.

The functions in question are: system(), getpid(), shell(), getenv(), 
setenv() and unsetenv().  All of these have equivalents among the newer 
std.process functions, as specified in the deprecation notices.

The exec*() family of functions is also marked as such, but it was 
agreed(?) in a NG discussion to only deprecate them on Windows, and to 
move them to a separate module on POSIX:

http://forum.dlang.org/thread/l4nav4$q9r$1@digitalmars.com?page=2#post-l4ph2m:2410t:242:40digitalmars.com

Lars