[update] update to upstream 1.6.26
Squashed 'dbus/' changes from e1d20aa..d5685bc

d5685bc 1.6.26
68cb9ea CVE-2014-7824: set fd rlimit to 64k for the system dbus-daemon

git-subtree-dir: dbus
git-subtree-split: d5685bcfb27fceb4bdc5eb0f46b6403fbbc319b2
Merge commit '6b265137265be5731c459a81f4630b8d3fad89a0'