Improve vfsgen to not unzip bindata files but send to browser directly (#7109)

* Don't unzip files from bindata but send to browser directly

* remove dependent for httpgzip

* Add tests for parseAcceptEncoding

* Update docs for ENABLE_GZIP

* Fix bug

* Fix bug

Co-authored-by: zeripath <art27@cantab.net>

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -264,7 +264,7 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
 - `STATIC_ROOT_PATH`: **./**: Upper level of template and static files path.
 - `APP_DATA_PATH`: **data** (**/data/gitea** on docker): Default path for application data.
 - `STATIC_CACHE_TIME`: **6h**: Web browser cache time for static resources on `custom/`, `public/` and all uploaded avatars. Note that this cache is disabled when `RUN_MODE` is "dev".
-- `ENABLE_GZIP`: **false**: Enables application-level GZIP support.
+- `ENABLE_GZIP`: **false**: Enable gzip compression for runtime-generated content, static resources excluded.
 - `ENABLE_PPROF`: **false**: Application profiling (memory and cpu). For "web" command it listens on localhost:6060. For "serv" command it dumps to disk at `PPROF_DATA_PATH` as `(cpuprofile|memprofile)_<username>_<temporary id>`
 - `PPROF_DATA_PATH`: **data/tmp/pprof**: `PPROF_DATA_PATH`, use an absolute path when you start gitea as service
 - `LANDING_PAGE`: **home**: Landing page for unauthenticated users \[home, explore, organizations, login\].

docs/content/doc/advanced/config-cheat-sheet.zh-cn.md

@@ -70,7 +70,7 @@ menu:
 - `KEY_FILE`: 启用HTTPS的密钥文件。
 - `STATIC_ROOT_PATH`: 存放模板和静态文件的根目录，默认是 Gitea 的根目录。
 - `STATIC_CACHE_TIME`: **6h**: 静态资源文件，包括 `custom/`, `public/` 和所有上传的头像的浏览器缓存时间。
-- `ENABLE_GZIP`: 启用应用级别的 GZIP 压缩。
+- `ENABLE_GZIP`: 启用实时生成的数据启用 GZIP 压缩，不包括静态资源。
 - `LANDING_PAGE`: 未登录用户的默认页面，可选 `home` 或 `explore`。
 
 - `LFS_START_SERVER`: 是否启用 git-lfs 支持. 可以为 `true` 或 `false`， 默认是 `false`。