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Author SHA1 Message Date
tomassedovic
aec0973196 Make the history session configurable
Using the FISH_HISTFILE variable will let people customise the session
to use for the history file. The resulting history file is:

    `$XDG_DATA_HOME/fish/name_history`

Where `name` is the name of the session. The default value is `fish`
which results in the current history file.

If it's set to an empty string, the history will not be stored to a
file.

Fixes #102
2017-06-30 17:13:02 -07:00