Note: use of git with cio mount option (on AIX/*nix)

[isc-tleavitt]

Note from @CraigRegester in #74:

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Git repositories cannot be properly initialized on filesystems mounted with the cio mount option. No error will be thrown during the init but any attempt to use the repo will result in an error that there is no git repository present.

git status
fatal: not a git repository (or any parent up to mount point /ucrfs)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).

In my case, /ucrfs/sys was set with the cio mount option. cio mount option is necessary/preferred (per ISC Documentation) on journal filesystems (e.g., /ucrfs/jrn and /ucrfs/altjrn) but git will not work with it. Fixing my mount options - our IRIS for Health instances have the /sys filesystem set without the cio mount option (we use it on the jrn/altjrn/db filesystem mount points however.)