Manual.rst: update all links to bootstrap to fixed version 3.4: https://getbootstrap.com/docs/3.4/...

Refs #8012: remove unit test for sanitize class 'password' - there is no T3 installation on alfred16. The test can't succeed.

Fixes #8067. Feature: url-sip / url-sip-skip-history - Form forwarding can now be used with SIP encoded parameter.

PDF/fileSplit: uploaded PDF file with missing extension '.pdf' have not been recognized as PDF files - fixed.

splitPdf: using 'fileSplit=jpeg' and uploading a PDF with only one page, results in split.jpg. Now, split.jpg is renamed internally to split-0.jpg to provide a repair shell script a unified naming scheme.