(doc)(FM-1277) limitation of cygwin

Noting the limitation and undesirable behavior seen with "Administrator" being
translated to "cyg_server" on some systems.
(doc)(FM-1277) update cygwin wording to "might"
(doc)(FM-1277) cygwin sshd limitation clarification

Adding some more clarification where the "cyg_server" rename of
"Administrator" has been seen to further prepare users in case
they run into the issue (if they are using sshd through cygwin).
Add supported metadata for release
Merge pull request #26 from cyberious/MetadataUpdate

Add supported metadata for release