Remove idleConns mutex for every request (#1986)

Locking and unlocking a mutex multiple times per request is a major
slowdown that we can avoid with clever use of atomics.

Before:
```
BenchmarkServerGet100ReqPerConn10KClients-12    	 84167428	       867.7 ns/op
```
After:
```
BenchmarkServerGet100ReqPerConn10KClients-12    	187397954	       386.3 ns/op
```

add dummy support for js,wasm (#1955)

fix: ShutdownWithContext and ctx.Done() exist race. (#1908)

* fix: ShutdownWithContext and ctx.Done() exist race.

* fix: Even if ln.Close() err, the Shutdown process should still proceed.

* refactor: remove END label.

fix RequestCtx is canceled (#1879) (#1890)

Create done channel in fakeServer during the initialization of newRequestCtx to prevent the done channel from being nil

Improve performance of ParseUfloat (#1865)

* Improve performance of ParseUfloat function

Replaced `offset` handling logic with more efficient math.Pow10 based calculation.

goos: linux
goarch: amd64
pkg: github.com/valyala/fasthttp
cpu: Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz
              │   old.txt   │           new.txt           │
              │   sec/op    │   sec/op     vs base        │
ParseUfloat-8   44.22n ± 0%   31.06n ± 0%  -29.76% (n=50)

* fix: lint error return value is not checked

* Handling uint64 overflow issues

* Implement ParseUfloat by calling strconv.ParseFloat

* fix: lint error

chore(deps): bump securego/gosec from 2.19.0 to 2.20.0 (#1776)

Bumps [securego/gosec](https://github.com/securego/gosec) from 2.19.0 to 2.20.0.
- [Release notes](https://github.com/securego/gosec/releases)
- [Changelog](https://github.com/securego/gosec/blob/master/.goreleaser.yml)
- [Commits](securego/gosec@v2.19.0...v2.20.0)

---
updated-dependencies:
- dependency-name: securego/gosec
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

fs: fix openIndexFile when dirPath is empty string (#1779)

fs: fix openIndexFile when dirPath is empty string (#1779)

Try to fix oss-fuzz low memory limit again

Prevent request smuggling (#1719)

* Prevent request smuggling

Prevent request smuggling when fasthttp is behind a reverse proxy that
might interprets headers differently by being stricter. Should also
prevent request smuggling when fasthttp is used as the reverse proxy.

* Make header value comparison case-insensitive