0.9 backports

@seungha.yang 0fe69cea needs backporting, can you take a look at that? Thanks!

@fengalin c021e2b6 785c9557 need backporting, can you take a look at that? Thanks!

added 20 commits

• 676b27fe...ca44cb76 - 10 earlier commits
• 58646d16 - livesync: example: Add identities single-segment=1
• 768cd9ab - livesync: log new pending segments
• 81179469 - livesync: display jitter when waiting on clock
• 1cc817e7 - livesync: Split fallback_duration into in_ and out_duration
• d5edd81a - livesync: Keep existing buffer duration in some cases
• 56676450 - livesync: Remove the stop from outgoing segments
• b2907c2c - Set sync=false in rsfilesink / s3sink
• 55162f4b - sccparse: Fix leading spaces between the tab and caption data
• baf91a1b - webrtcsrc: add turn-servers property
• b8ce4a07 - Update Cargo.lock

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added 1 commit

• 2ec3635b - hlssink3: Various cleanup

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added 1 commit

• 314e53e7 - hlssink3: Various cleanup

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added 33 commits

• 314e53e7...52f0549f - 23 earlier commits
• e7c30d83 - livesync: log new pending segments
• 2018bbd5 - livesync: display jitter when waiting on clock
• ec5dc943 - livesync: Split fallback_duration into in_ and out_duration
• 22251602 - livesync: Keep existing buffer duration in some cases
• b07e8442 - livesync: Remove the stop from outgoing segments
• 1173cea1 - Set sync=false in rsfilesink / s3sink
• 22a6ccb6 - sccparse: Fix leading spaces between the tab and caption data
• 390a91fa - webrtcsrc: add turn-servers property
• c15a5bfe - Update versions to 0.9.12
• 712a2a79 - Update Cargo.lock

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added 31 commits

• 712a2a79...b0036513 - 21 earlier commits
• e58da259 - livesync: example: Add identities single-segment=1
• 77cf56a0 - livesync: log new pending segments
• a14a6ec5 - livesync: display jitter when waiting on clock
• 1f471196 - livesync: Split fallback_duration into in_ and out_duration
• ff6b9491 - livesync: Keep existing buffer duration in some cases
• 71c55a11 - livesync: Remove the stop from outgoing segments
• 763768c0 - Set sync=false in rsfilesink / s3sink
• ae23d69d - sccparse: Fix leading spaces between the tab and caption data
• 174db628 - Update versions to 0.9.12
• ecdc6943 - Update Cargo.lock

Compare with previous version

resolved all threads

assigned to @gstreamer-merge-bot

mentioned in commit slomo/gst-plugins-rs@3fff6e93

mentioned in commit slomo/gst-plugins-rs@68584522

mentioned in commit slomo/gst-plugins-rs@76d8f369

mentioned in commit slomo/gst-plugins-rs@a3f7b1fb

mentioned in commit slomo/gst-plugins-rs@d98c6f44

mentioned in commit slomo/gst-plugins-rs@4d1be8e1

mentioned in commit slomo/gst-plugins-rs@181e4524

mentioned in commit slomo/gst-plugins-rs@6cf1c724

mentioned in commit slomo/gst-plugins-rs@93b20a03

mentioned in commit slomo/gst-plugins-rs@6f567c8f

mentioned in commit slomo/gst-plugins-rs@166b36f2