URI encoding for Windows OS

@timbl @angelo-v
The following PR in 2017 rejects the use of : | / in POST. I suppose it was to preserve the possibility to use NSS on windows.
https://github.com/solid/node-solid-server/commit/5bba6c931fe0b319b6b350b8338b6e144b0b67fa#diff-98a11be785b8100aab3a553eed0e3656a235f06463d2979fd08bafcdf503abdf

      slug = decodeURIComponent(slug)
      if (slug.match(/\/|\||:/)) {
        throw error(400, 'The name of new file POSTed may not contain : | or /')
      }

Using longChat in chat With Me encounters some problem because this control is not applied on PUT, when creating intermediate folders.
see https://github.com/solid/chat-pane/issues/51

I suppose we need some coherence, what is your position :

1. remove the control in POST
2. add the control in all write functions including PUT PATCH (filename and intermediate containers)

先檢視 commit 5bba6c931fe0b319b6b350b8338b6e144b0b67fa 與 POST、PUT、PATCH 的寫入路徑，再比較 solid/chat-pane#51 中描述的 longChat 失敗。當 POST、PUT、PATCH、檔案名稱與中間容器對 ':', '|' 和 '/' 的處理一致，且選定的行為已有文件說明或由相關測試涵蓋時，即表示完成。