Changes:
- ABI detection related fixes
- Lots of fixs for MacOS
- Fix host component handling in file:// URLs
- build system: add --with-tsan support
- fix threads on MacOS
- pkg -vv now shows bundled/external libraries version
- pkg: -r command can be used multiple times to only enable
the specified repositories.
- UI: small improvements in error messages
- repositories: new pkg repositories command to list configured
repositories
- vuxml: now fetched over https
- check: now default on the -s option when no options is passed.
