### Please describe the problem.

When looking over the [[bug reports|bugs]] here some of them are missing the "Operating system" info in the `git annex version` output. The reason for this is that the `git annex version` output depends on whether it was run inside an annex repo or not.

### What steps will reproduce the problem?

Run `git annex version` outside of an annex repo:

    git-annex version: 6.20180509
    build flags: Assistant Webapp Pairing S3(multipartupload)(storageclasses) WebDAV Inotify DBus DesktopNotify ConcurrentOutput TorrentParser MagicMime Feeds Testsuite
    dependency versions: aws-0.14.1 bloomfilter-2.0.1.0 cryptonite-0.20 DAV-1.3.1 feed-0.3.11.1 ghc-8.0.1 http-client-0.4.31.1 persistent-sqlite-2.6 torrent-10000.0.0 uuid-1.3.12 yesod-1.4.3
    key/value backends: SHA256E SHA256 SHA512E SHA512 SHA224E SHA224 SHA384E SHA384 SHA3_256E SHA3_256 SHA3_512E SHA3_512 SHA3_224E SHA3_224 SHA3_384E SHA3_384 SKEIN256E SKEIN256 SKEIN512E SKEIN512 SHA1E SHA1 MD5E MD5 WORM URL
    remote types: git gcrypt p2p S3 bup directory rsync web bittorrent webdav adb tahoe glacier ddar hook external


Run `git annex version` inside an annex repo:

    git-annex version: 6.20180509
    build flags: Assistant Webapp Pairing S3(multipartupload)(storageclasses) WebDAV Inotify DBus DesktopNotify ConcurrentOutput TorrentParser MagicMime Feeds Testsuite
    dependency versions: aws-0.14.1 bloomfilter-2.0.1.0 cryptonite-0.20 DAV-1.3.1 feed-0.3.11.1 ghc-8.0.1 http-client-0.4.31.1 persistent-sqlite-2.6 torrent-10000.0.0 uuid-1.3.12 yesod-1.4.3
    key/value backends: SHA256E SHA256 SHA512E SHA512 SHA224E SHA224 SHA384E SHA384 SHA3_256E SHA3_256 SHA3_512E SHA3_512 SHA3_224E SHA3_224 SHA3_384E SHA3_384 SKEIN256E SKEIN256 SKEIN512E SKEIN512 SHA1E SHA1 MD5E MD5 WORM URL
    remote types: git gcrypt p2p S3 bup directory rsync web bittorrent webdav adb tahoe glacier ddar hook external
    local repository version: 5
    supported repository versions: 3 5 6
    upgrade supported from repository versions: 0 1 2 3 4 5
    operating system: linux x86_64


### What version of git-annex are you using? On what operating system?

    git-annex version: 6.20180509
    build flags: Assistant Webapp Pairing S3(multipartupload)(storageclasses) WebDAV Inotify DBus DesktopNotify ConcurrentOutput TorrentParser MagicMime Feeds Testsuite
    dependency versions: aws-0.14.1 bloomfilter-2.0.1.0 cryptonite-0.20 DAV-1.3.1 feed-0.3.11.1 ghc-8.0.1 http-client-0.4.31.1 persistent-sqlite-2.6 torrent-10000.0.0 uuid-1.3.12 yesod-1.4.3
    key/value backends: SHA256E SHA256 SHA512E SHA512 SHA224E SHA224 SHA384E SHA384 SHA3_256E SHA3_256 SHA3_512E SHA3_512 SHA3_224E SHA3_224 SHA3_384E SHA3_384 SKEIN256E SKEIN256 SKEIN512E SKEIN512 SHA1E SHA1 MD5E MD5 WORM URL
    remote types: git gcrypt p2p S3 bup directory rsync web bittorrent webdav adb tahoe glacier ddar hook external
    supported repository versions: 3 5 6
    upgrade supported from repository versions: 0 1 2 3 4 5
    operating system: linux x86_64


### Please provide any additional information below.

It might make sense to also always output "supported repository versions" and "upgrade supported from repository versions" because they also do not depend on the current annex repo.

### Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)

I am a long time happy user of git-annex. Thank you for your never ending effort!

> [[done]] --[[Joey]]
