Command line used was:

find * -type f \( -name "*.pm" -or -name "*.pl" -or -name "*.c" -or -name "*.v" -or -name "*.vhd" -or -name "*.psl" \) -print0 | parallel -q -0 sed -ri -e 's/^([[:blank:]]*[^[:blank:]]+)([[:blank:]]+)(https:\/\/embsys.technikum-wien.at\/projects\/vecs\/fiji)/\1\2\3\n\1\n\1\2The creation of this file has been supported by the publicly funded\n\1\2R\&D project Josef Ressel Center for Verification of Embedded Computing\n\1\2Systems (VECS) managed by the Christian Doppler Gesellschaft (CDG)./g'

Also, add some missing strict/warning statements and fix resulting
warnings and refine some comments in the headers of files.

This patch adds support for key accelerators and -underline.
It parses the given button labels for ~, underlines the character
following it, and adds a binding of <Alt-character> for the
respective button. Strings for labels are cleaned of any ~ which
has the potential for regressions.