updated to postgresql-42.7.1;

updated to sqlite-jdbc-3.45.0.0, including slf4j-1.7.36;

update to llncs-2.23; update src/Doc/Demo_LLNCS to include the new mandatory section "Disclosure of Interests";

clarified bootstrap;

clarified directories;

clarified directories;

obsolete (see also fc88b943e1b2);

proper output, following 2cd23d587db9;

always use patchelf on Linux: base-line is Ubuntu 18.04 where that works properly (see also e79294c4230c);

clarified directories;