Merge branch 'hotfix/1.22.19'
new rubygems versions
add a documentation note and build docs by default on Darwin, closes #2252
deffer removing .git from sources so rubies can use it for version, closes #2264
reverse linking @global with default gems path, closes #2267
do not inject GEM_HOME to binaries, closes #2266
improved detection of links when linking @gemhome, update #2267
add deprecation warning for more rubies, closes #2265
make sure to not update certificates when installing binary jruby, fix #2268
fix removing gemsets, update #2267
fix globalcache
update test
implement deep readlink to eliminate repeating code
1.23.0
Merge branch 'release/1.23.0' into stable