Merge branch 'hotfix/1.21.19' into stable
upgrade removing gemset warning to an error, fix #2108
produce stdin for rvm_debug_stream to prevent missing stdout when it is used in pipes, fix #2110
add a way to silence path mismatch check, fix #2112
1.21.20
add a way to silence path mismatch check, fix #2112
Merge branch 'hotfix/1.21.20'
account for short file names in ecryptfs / ubuntu, fix #2111
fix naming rubies when mounting, update #2107
fix mounting external rubies, fix #2107
remove traces of rvm_externals_path - it is no more needed, update #2107
Add instructions on removing binstubs prompt.
Merge pull request #2113 from straydogstudio/master

Improved binstubs prompt