- fix broken links
- move all content into CONTRIBUTING.md from https://icu.unicode.org/processes/contribute
- no process change
Co-authored-by: Markus Scherer <markus.icu@gmail.com>
This is the normal standard way in C, C++ as well as Java and there's no
longer any reason for ICU to be different. The various internal macros
providing custom boolean constants can all be deleted and code as well
as documentation can be updated to use lowercase true/false everywhere.
Includes:
- https://sites.google.com/site/icusite/processes/release/tasks/*
- https://sites.google.com/site/icusite/processes/uni-up
Some links fixed, copyright notices added, filenames improved, Sidebar
navigation links to the new pages, but needs some further
improvements. Updated /trac/ticket/ links, and /trac/changeset/ links
where I could find the corresponding git commit. Also tweaked
userguide/dev/editing.md to clarify 'root directory'. Apply branch
rename: s/master/main/.