This is a maintenance release. The following items were fixed and/or added:

GUI: Mac OS X: Restore green zoom button for VM windows (it was hidden in the previous release to avoid native full-screen issues). For Yosemite and El Capitan this button should work accordingly to the Apple HIG: Full-screen by default, maximize if the user holds the Option key.
Serial ports: fixed wrong IRQ number for the first serial port in the ACPI tables (5.0.6 regression; bug #14659)
API: fixed a 5.0 regression in VBoxManage setproperty defaultfrontend (bug #14696)
VBoxManage/vbox-img: conversion to RAW images could result in a disk image containing all zeroes
Linux hosts: several fixes for systemd integration in .deb / .rpm packages (e.g. bug #14665). The command for recompiling the host kernel modules was changed to /sbin/vboxconfig
Linux hosts: make host-only interfaces report operstate UP only when they have VMs attached (bug #14526)
Mac OS X hosts: fix bpf capture and accounting of traffic on bridged and host-only interfaces (bug #14553)
Windows guests: fixed 3D rendering issues on high resolution displays
Windows Additions: fixed problems with 3D acceleration on Windows hosts with Intel HD graphics (bug #14670)
Linux Additions: fix service starting on Debian systems with systemd installed but not in use (bug #14683)

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