ReCaptcha feature
ReCaptcha config from setup script

Added config setting to be available from the ./setup script. Captcha
public and private keys are added in the Features->Security tab, the
captchaLogin is available in the New Server tab where you can enable or
disable reCaptcha for that server.
ReCaptcha https and CSP bug fixes
ReCaptcha error message
Recaptcha bug fixes

Error message for empty captcha "Please enter correct captcha!" and if
the user enters correct captcha but wrong login data it won't be
required to enter it next time.
Translated using Weblate (Portuguese (Brazil))

Currently translated at 100.0% (2603 of 2603)
bug #3971 Ctrl/shift + click opens links in same window
Translated using Weblate (Hindi)

Currently translated at 57.0% (1483 of 2603)
Merge remote-tracking branch 'origin/QA_4_0' into QA_4_0
Merge commit '70a3d4a'
Merge commit 'b5089cf'
Merge commit 'a2593c0'
Translated using Weblate (Hindi)

Currently translated at 54.4% (1449 of 2665)
Merge remote-tracking branch 'origin/master'
Update session upload progress bug comment in import_status.php
Update session upload progress bug comment in import_status.php
Merge remote-tracking branch 'origin/QA_4_0'
Translated using Weblate (Indonesian)

Currently translated at 71.4% (1903 of 2665)
Merge remote-tracking branch 'origin/master'
refactor server_collations.php
1. split long function
2. add server_common.lib.php