Replace `f` alias with Clipper helper for use with Mosh
Replace `f` alias with Clipper helper for use with Mosh

As described in these docs[1], I'm going to try using Mosh for sandbox
connections for a while. This means still using SSH for maintaining a
Clipper tunnel.

So, re-purpose the `f` alias (mnemonic: "forward") seeing as I am not
using Flow anymore.

[1]: https://github.com/wincent/clipper/commit/2741cbc177e483dc50e525c

Signed-off-by: Wincent Colaiuta <c76ac2e9cd86441713c7dfae92c451f3e6d17fdc@wincent.com>

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