Operating systems don't report monitors from 0, so OBS shouldn't
either. This avoids user confusion when display capture doesn't work.
This does not change monitor count internally.

UI: Add support for Restream "Auto" server in auto-config

decklink: Remove redundant const qualifiers

rtmp-services: Remove LiveEdu from services

They now provide ingest URLs on demand in their panel.
The ones in our list point to random OVH IPs that are likely assigned to
new customers by now and refuse the connection on TCP port 1935.

rtmp-services: Update Twitch and Smashcast ingests

Closes obsproject/obs-studio#1544

Twitch Oslo ingest is still omitted as it currently still points to
the Stockholm domain.

obs-filters: Add downward expander filter

The downward expander acts as an advanced gate with smoother effect
since it lowers the level instead of discarding audio when below the
threshold.

The first audio track was not recorded following the API changes for
 custom ffmpeg recording (adding multi-track support).
 This fixes the issue (spotted by EposVox, thanks to him for the report).

The GDI+ based Text Source actually uses Premultiplied Alpha. The edges
of the fonts are therefore incorrectly blended, causing ugly artifacts
especially if bright text above a bright background is used. Here's an
image comparing the new text blending (left) to before (right):
![https://i.imgur.com/VhhkQcZ.png](https://i.imgur.com/VhhkQcZ.png)

Additionally, the game capture has the same problem, so premultiplied
alpha is used there as well now.

Closes obsproject/obs-studio#1613

This patch adds Indian server released by Restream to the list of predefined servers.

Closes obsproject/obs-studio#1626

* UI: Fix mem leak with projectors

* UI: Fix mem leak with ScaleFilteringMenu

* UI: Fix mem leak with sourceProjector

* UI: Fix leak with preview projector in Source menu and Preview

* UI: Fix mem leaks with background color menu

* UI: Fix leak with deinterlace Menu

* UI: Fix leak with scene transition override menu

* UI: Fix leak with scene projector menu

* UI: Fix leak with filter shortcut in Main

* UI: Fix leak with filter shortcut in stats

Authors: Update Contributors list

decklink: Initialize member variable

syphon: Remove references to game capture

A bit of a hack, but this is one of the more common errors that users
are encountering, so showing useful information will help cut down on
the number of support issues.

We don't read cached offsets any more, so it makes little sense to write
them on every startup.

Increase the buffer size to read the response in one call if possible,
and cause an error condition with log message if the offsets string is
empty.

- Enable b-pyramid frames
- Adjust packet priority to avoid dropping referencable B frames

Closes obsproject/obs-studio#1520

Closes obsproject/obs-studio#1625

Fixes the narration reading (for the blind) for items in the sources
list; previously they would not be read due to the new custom model.
This issue is solved by returning the name of item in the form of a
QVariant of a QString returned from the QAbstractItemModel::data virtual
function when the Qt::AccessibleTextRole role is used.

Uses the "Auto" server automatically for Restream rather than doing a region-based test on multiple servers.

Prevents audio from cutting out below the -1000 offset (approximate)
threshold.

Reduces log file clutter by not logging certain warning messages that
were already safe/normal/expected failures.

Although log files are saved with the date in the name of the log file,
it's also nice to be able to see it inside the log file itself,
especially when uploaded to a text service.

Co-authored-by: Npkviet <pkv.stream@gmail.com>

UI: Save scene collection before export

Update all UI at default values when clicks "Defaults" button in the
source Properties.

This fixes mantis issue 1242.

Closes obsproject/obs-studio#1592

Some of the format of the Json changed (adding alt_names), so update the
format version to prevent it from being used with older versions.

libobs: Allow const argument in obs_set_cmdline_args