a034f8b60c
Stop naming special area/opaque pointer variables 'lpageop' in contexts where it doesn't make sense. This is a holdover from a time when logic that performs tasks that are now spread across _bt_insertonpg(), _bt_findinsertloc(), and _bt_split() was more centralized. 'lpageop' denotes "left page", which doesn't make sense outside of contexts in which there isn't also a right page. Also acquire page flag variables up front within _bt_insertonpg(). This makes it closer to _bt_split() following refactoring commit bc3087b626d. This allows the page split and retail insert paths to both make use of the same variables.
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