RepoLink -> Link, RepoRelLink -> RelLink, FullRepoLink -> FullLink

* Add MaxDisplayFileSize setting

* Don't show files that are too large

* Localized FileTooLarge

* Change IsFileTooBig => IsFileTooLarge

Executed go fmt

getEngine() not handles DB parameters (#2972) (#2974)

Uses .AllCols() for Update in updateMirror()

Spanish traslation removed

Fixed a wrong way to ommit the --prune option in process.ExecDir() for MirrorUpdate function

Re: issues gogits/gogs#2863 and gogits/gogs#3231

As a result of modifications to the contents of the conf folder, `make bindata`
was run, causing an update to bindata.go.

Meta
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This commit will be rebased onto the 'develop' branch.

This prevents user retrieve arbitrary webhook by changing URL to
access webhook from other unauthorized repositories.

Initially proposed by #2376 and fixes #3068 as well.

Closes #2764

- Update locale bindata

Always send user to settings screen to change avatar.
Drops "change_custom_avatar" localized message, keeps "change_avatar"
for the generic one.

NOTE: only changes the en-US locale, as per
https://github.com/gogits/gogs/wiki/Contributing-Code#those-we-do-not-accept

NOTE: requires rebuild of bindata.go to fully see effects

Add start count corrector for Repository.NumClosedIssues

- Update language choose dropdown to fit more languages

* Add and start jQuery AreYouSure

* Update SimpleMDE to 1.10.1 for `forceSync` support

* Forgot to remove old version SimpleMDE 1.10.0

* formatting -.-

Fix #2872

When use builtin SSH server with concurrent operations, there are probabilities
One connection could use the command from another connections.

Fix this by set SSH_ORIGINAL_COMMAND for each command, not set in global scope.