don't truncate environment sometimes in setproctitle
don't truncate environment sometimes in setproctitle

Instead, let's just allocate new space for the proctitle to live and point
the kernel at that.

v2: take out testing hunk
v3: check return from realloc

Signed-off-by: Tycho Andersen <10c18fcb898ee6b17d6575d444b125d10b3f4d6a@canonical.com>
Acked-by: Serge E. Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

lxc/lxc-pkg-ubuntu,lxc/lxc-pkg-ubuntu,lxc/lxc-pkg-ubuntu