Docs site: name the maintainer in the footer, not the repository owner

Cayman's footer renders "<repository> is maintained by <site.github.owner_name>",
and that name comes from whoever owns the repository, so seredis.dev read
"StackExchange.Redis is maintained by StackExchange". That is a statement about
ownership rather than maintenance, and it isn't true of this project.

jekyll-github-metadata merges anything set under `github:` in _config.yml over
the values it reads from the API (SiteGitHubMunger#github_namespace is
`drop.merge(@original_config)`), so overriding owner_name/owner_url is enough -
no layout override, and no copy of the theme's markup to keep in step. Nothing
else on the site reads either key; Cayman uses them only in that footer span.

The alternative was dropping the line entirely via `is_project_page: false`, but
Cayman guards its "View on GitHub" button with the same flag, which we do want.

Add possibility to use different passwords for Sentinel and Redis host (

#1698) (#3140)

* Add possibility to use different passwords for sentinel and redis (#1698)

* Use correct Sentinel properties in ConfigurationOptions.ToString()

* Removed unused usings

* - added sentinel user/pw fields to unit test that checks ConfigurationOptions
- fixed typos, so fields, not properties, are used on the correct places

* Fix test

* Use a private _isSentinel instead of serverType

* Moved Sentinel credentials usage to HandshakeAsync

* another property <-> field mixup fixed

Co-authored-by: Marc Gravell <marc.gravell@gmail.com>

* another property <-> field mixup fixed

Co-authored-by: Marc Gravell <marc.gravell@gmail.com>

* Moved Sentinel credentials usage back to SentinelPrimaryConnect(Async) in ConnectionMultiplexer.Sentinel

* Restore CodeAnalysis using for [Experimental]; move new API entries to Unshipped

---------

Co-authored-by: Marc Gravell <marc.gravell@gmail.com>

Config strings: '!@name' is a Linux abstract Unix socket (socat/syste…

…md '@' convention) (#3165)

'!name' has always meant a Unix domain socket, but '!@foo' silently produced a PATHNAME socket
literally named '@foo' -- the wrong socket, found by nothing. The parse now maps '@' after '!' to the
kernel's leading-NUL spelling, Linux-gated (no other platform has the namespace; elsewhere '@' stays a
literal filename, matching redis-cli). ToString round-trips for free: UnixDomainSocketEndPoint renders
abstract names back as '@name'.

Tests: FormatTests gains UDS parse/round-trip coverage (there was NONE, even for pathnames) -- pathname
and abstract cells, the latter Linux-gated. Verified live end-to-end besides: a ConnectionMultiplexer
built from ConfigurationOptions.Parse("!@se-abs-test,abortConnect=true") against a Garnet listening
on the same abstract name, SET/GET round-trip clean, no filesystem footprint.

WithRetry().CreateTransaction(...) should : ITransaction, for legacy …

…type testing (#3151)

3.1 GA shipfiles etc

update 8.10 test validation image (#3143)

version 3.1

Throw a clear error when an Execute command contains whitespace (#3122)

* Throw a clear error when an Execute command contains whitespace

Execute("ACL SETUSER x") passes a whole command line as the single command
token, which gets sent as one unknown command and comes back as an opaque
server error. Since a redis command token never contains internal whitespace,
this is always a caller mistake, so the ExecuteMessage constructor now fails
fast with an ArgumentException-style RedisCommandException that names the
offending command and shows the correct token-per-argument form. Resolves #2689.

Signed-off-by: Arpit Jain <arpitjain099@gmail.com>

* test for simple space only

limit to simple space; if people are being *that* creative, that's on them

* Remove test case for 'echo\thello' command

Removed test case for command with tab character.

---------

Signed-off-by: Arpit Jain <arpitjain099@gmail.com>
Co-authored-by: Marc Gravell <marc.gravell@gmail.com>

Optimize RedisValue / reader logic by using canonical parser and new …

…ShortBlob storage kind (#3114)

* spike better RedisValue parsing logic

* Introduce new storage kind for small payloads (<=8 bytes) - avoids array alloc

* fix CI

* CI: tweak failing test

* tidying (support ulong as canonical)