* Add `login_tzc` and `login_zeph02` functions to remove redundant comparison
* Add `get_zephyr_realm` function to reduce code duplication
* Extract some functions
* Use `FALSE` in `purple_account_get_bool`
* Replace `read_anyone` and `read_zsubs` variables with functions calls
Testing Done:
Compile.
Reviewed at https://reviews.imfreedom.org/r/405/
PidginandFinch:ThePimpin' Penguin IM Clients That'reGoodfortheSoul
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