Revert "git autosetuprebase"

This reverts commit 3e67a9764d07173b76eda02d871b726438f2f777. That
option caused inconsistent behavior, because it only applied to new
repos/branches. Prefer to rely on the "gpr" alias for the behavior I
want.
gs and gd git aliases; get rid of g
add alias gl='git log'
let ctrl-l clear search highlighting in insert mode too