Avoid bleeding authentication credentials into logs.

API Changes: URL:GetWithoutUserDetails() ->
URL::GetWithoutUserDetails(bool redacted=false)

Replacing std::string for CStdString, for the relevant callstack below
CURL::getWithoutUserDetails(), mainly URIUtils, CStdString functions are kept
 as wrappers around the std::string versions.

Manual code reviews of all the affected files in filesystem. I've made semi conservative decisions on where to change the code. This means that some instances may have slipped through the cracks, since I've tried to avoid changing code I didn't understand.

I've looked into the following systems:
-Samba
-FTP
-SFTP
-HTTP
-WebDAV
-Stacks
-NFS (N/A)
-UPnP (N/A)
-RSS (N/A)

In addition, I've tried to mess around to find leaks in different other parts of the system.

I see this as an incremental commit, removing almost all leaks in the normal codepaths. There may still be some leakage in paths I don't commonly use.
Passed scan of 40TB of well-formed content, without any leaks.
Added regression tests for URL::GetWithoutUserDetails()
Merge pull request #3324 from bfg1981/Privacy

Avoid bleeding sensitive information into logs.
[settings] fix dealdlock in SettingsManeger introduced in #3512

As sugested by Montellese, using a shared lock fixes the deadlock in
SettinsManeger.
Merge pull request #3558 from huceke/fixups

[settings] fix dealdlock in SettingsManeger introduced in #3512
AE: re-add setting normalizelevels, formally inverted and known as boost volume on downmix
remove unused CProfilesManager::OnSettingsLoading()
videodb: remove commented out code
Merge pull request #3555 from FernetMenta/aefixes

AE: re-add setting normalizelevels, formally inverted and known as boost...
[3D] Support switching to 3D resolutions

Include matching 3D flags (SBS/TAB) in the score of a resolution to switch to, to enable switching to 3d modes.
Also remove the old code that treated 3D modes differently when assigning a score.

I've also added a small weight to higher multiples of the desired framerate, so if display supports 30, 60 and 120Hz
and the video is 30fps then 30 will now be chosen rather than 120. This reduces the overhead of rendering the gui.
[confluence] Use animated gif as a cheaper working spinner
[rbp/omxplayer] Do we need discontinuity handling?

So far I've not seen what this is needed for and it does cause problems for some files.
h264_parser: Initialize the h264dsp context in the parser as well

Each AVStream struct for an H.264 elementary stream actually has two
copies of the H264DSPContext struct (and in fact all the other members
of H264Context as well):

((H264Context *) ((AVStream *)st)->codec->priv_data)->h264dsp
((H264Context *) ((AVStream *)st)->parser->priv_data)->h264dsp

but only the first of these was actually being initialised. This
prevented the addition of platform-specific implementations of
parser-related functions.

Signed-off-by: Martin Storsjö <martin@martin.st>
h264dsp: Factorize code into a new function, h264_find_start_code_candidate

This performs the start code search which was previously part of
h264_find_frame_end() - the most CPU intensive part of the function.

By itself, this results in a performance regression:
              Before          After
              Mean   StdDev   Mean   StdDev  Change
Overall time  2925.6 26.2     3068.5 31.7    -4.7%

but this can more than be made up for by platform-optimised
implementations of the function.

Signed-off-by: Martin Storsjö <martin@martin.st>
arm: Add assembly version of h264_find_start_code_candidate

               Before          After
               Mean   StdDev   Mean   StdDev  Change
This function   508.8 23.4      185.4  9.0    +174.4%
Overall        3068.5 31.7     2752.1 29.4     +11.5%

In combination with the preceding patch:
                Before          After
                Mean   StdDev   Mean   StdDev  Change
Overall         2925.6 26.2     2752.1 29.4     +6.3%

Signed-off-by: Martin Storsjö <martin@martin.st>
[ffmpeg] Backport of h264_find_start_code_candidate optimisation
[rbp/gui] Add switch between higher and lower quality textures

To save memory we default to 16bpp textures,
but provide a GUI option to increase that to 32bpp.
[rbp/gui] Add switch to remove GUI 720p limit
[rbp/omxplayer] Add caching of states to reduce number of round trip delays to GPU
Revert "[rbp/omxplayer] Add caching of states to reduce number of round trip delays to GPU"

This reverts commit 691cfc567895b6645d7052b292f44f557004059b.