Though this should now be very rare, it's more helpful than "Failed to
connect to server". Other TLS error codes are now also stored for future
use instead of copying them on a case by case basis.

Errors or warnings in RTMP_Init were not copied to the OBS log file
if they occured before the callback was set.

Fixes https://github.com/obsproject/obs-studio/issues/2350. Also adds
some log file output for when the root certificates can't be loaded to
make it more obvious what the problem is.

Per mbedtls documentation, "If you share a context between threads, you
need to call these functions only from the main thread, at the beginning
and end of the context's lifetime.". OBS violated this since librtmp
uses a global context and it was allocated and freed in different
threads such as the auto config test.

This commit attaches the mbedtls context to an RTMP structure so there
is no more global state. It also fixes a rare double-free crash that
could occur if RTMP_TLS_Free was called twice (this happened in rare
situations such as the auto config running followed by a mode change
from Advanced to Simple).

libobs, obs-x264: Fix compiler warnings

UI: Fix t-bar not working with transition override

rtmp-services: Add Uscreen

libobs: Add VIDEO_CS_SRGB enum value

UI: Fix Qt 5.14 deprecation warnings

libobs: Rename DEPRECATED to OBS_DEPRECATED

These functions should be available on current Qt.

Avoid collisions with other libraries that define DEPRECATED.

docs/sphinx: Add obs_group_from_source and obs_enum_scenes

audio-monitoring: Fix Pulse Audio crash

Can't implement all at once because of AMF submodule.

image-source: Fix color source default size

We have a new back-end to the SermonAudio webcasting system which required a new URL and now allows for increased bitrates.

Added the "alt_names" to avoid breaking backwards compatibility and ensure that users receive the new ingest URLs.

UI: Fix studio mode transition bugs

UI: Support URL/web DnD in linuxbrowser

It's taking up CI build time, so just remove it.

obs-plugins: Change defaults of various plugins

UI: Upgrade stream key link to button in Wizard

This allows the ability to do things such as change defaults or
properties of sources without necessarily breaking older user
configurations that had older defaults or properties.

-If the user were in the middle of a transition and clicked
the cut transition, the transitions would become borked.

-This actually disables the transition widgets, so the
user doesn't click them. Before, the disabling of the
widgets didn't work as expected. The code for enabling/disabling
them was also simplified.

-This loading of studio mode was moved in OBSInit because
the loading of transitions needs to happen first. This fixes
a bug when enabling/disabling the t-bar when the program
is first loaded. The t-bar would be disabled even if a
cut or stinger transition was not used.

-When the user would click the quick transitions, the
t-bar would be enabled even when it was not supposed
to.

win-dshow: Fix upside-down RGB DIBs

Fix regression to RGB DIB orientation according to MSDN.

Add support for checking multiple source types in Drag n Drop callback
to support overlays for linuxbrowser users. Once the "browsersource" is
available on the platform it will have priority.

Cube LUT file support