In authorized_keys use double-quote for windows compatibility

[zeripath]

It appears that windows OpenSSH cannot cope with single quoted strings. Use double-quotes instead.

Fix #10813

[guillep2k]

The problem with " is that the content is subject to expansion in sh-like environments. Especially $ and most importantly the back tick for sub-shell executions. For example:

Expression                  Expands to
------------------------    -------------------
"this$HOME"                 this/home/git
'this$HOME'                 this$HOME
"this`echo HI!`"            thisHI!
'this`echo HI!`'            this`echo HI!`

You get the idea.

Having said that, the usage here is very restricted, and unless the admin has the peculiar idea of installing Gitea in a PATH such as

/home/my`rm -rf *`user/bin/gitea

we should be covered.

So, LG-TM.

[lafriks]

make lgtm work

[zeripath]

As @guillep2k says it may be that strconv.Quote/fmt.Sprintf("%q") does not completely quote things correctly but I guess this is a good start.