- v2.0 in PX4/Firmware (23017d051b7ff6686c8c8ff025a8e98af094780a): https://github.com/mavlink/c_library_v2/commit/163d4c84b9eb58a02cab94d039f54c303977d991
    - v2.0 current upstream: https://github.com/mavlink/c_library_v2/commit/c55dd0ec312a667f28b0cab4f1fe697d2888c00c
    - Changes: https://github.com/mavlink/c_library_v2/compare/163d4c84b9eb58a02cab94d039f54c303977d991...c55dd0ec312a667f28b0cab4f1fe697d2888c00c

    c55dd0e 2018-04-12 PX4BuildBot - autogenerated headers for rev https://github.com/mavlink/mavlink/tree/292874beed6bf756be45421bd2ae2420de921f2b
e2916e5 2018-04-10 PX4BuildBot - autogenerated headers for rev https://github.com/mavlink/mavlink/tree/012765b923546224ef928caeb86c72d5a78a433a

    - sitl_gazebo in PX4/Firmware (4ffa98aa): https://github.com/PX4/sitl_gazebo/commit/28921bca9df9a212675b8e888c926d1ec6f6b28e
    - sitl_gazebo current upstream: https://github.com/PX4/sitl_gazebo/commit/0df46c53b14ef4241b33fb7a74a3cb6f9d83c6dd
    - Changes: https://github.com/PX4/sitl_gazebo/compare/28921bca9df9a212675b8e888c926d1ec6f6b28e...0df46c53b14ef4241b33fb7a74a3cb6f9d83c6dd

    0df46c5 2018-04-13 Tully Foote - Only use catkin env hook command if building with catkin.
38c0d07 2018-04-12 Tully Foote - Add package to GAZEBO_RESOURCE_PATH to make the worlds accessible.
5811488 2018-04-11 Tully Foote - updating OpticalFlow submodule
7c79bd7 2018-04-10 Tully Foote - Add environment hooks to export paths for plugins and resources.

We got over the limit

Signed-off-by: Roman <bapstroman@gmail.com>

- created one method which has access to the pwm output device

Signed-off-by: Roman <bapstroman@gmail.com>

- board config can define PX4_PWM_ALTERNATE_RANGES which needs to be known
by the compiler prior to processing this file

Signed-off-by: Roman <bapstroman@gmail.com>

Signed-off-by: Roman <bapstroman@gmail.com>

Signed-off-by: Roman <bapstroman@gmail.com>

Signed-off-by: Roman <bapstroman@gmail.com>

to VtolType class

Signed-off-by: Roman <bapstroman@gmail.com>

- moved methods used to modify channel maximum pwm value to VtolType
class so that the can be shared by the differnt vtol types

Signed-off-by: Roman <bapstroman@gmail.com>

 - closes #9277

- disables setting of the errno variable as required by C89/C99 on calling math library routines

- Addional small cleanup of the iridium driver and the include guards of mavlink module header files

Due to the old heartbeat of the high latency telemetry when activating it after flying sufficiently long in normal telemetry it is first detected as lost until the first message is sent.
By updating the heartbeat to the current time on switching this issue is avoided.

Also includes a small style fix for the HIGH_LATENCY2 stream