(shp_set_tech, pln_set_tech, lnd_set_tech): New, factored out of build

(shp_set_tech, pln_set_tech, lnd_set_tech): New, factored out of build
and upgrade code.
(build_ship, build_plane, build_land, supgr, pupgr, lupgr): Use them.
Upgrading planes no longer sets plane range to maximum.

(pupgr): Just clear the mission, don't bother to clear op area.

(doship, doplane, dounit): Editing tech now updates stats, like an
upgrade command.  Proper range checking.
(warn_deprecated): New.
(pr_ship, doship): Deprecate key 'D'.
(pr_land, dounit): Deprecate key 'A' and 'D'.