[neeerp]

Legendary Spirit (1003 / 10001003 / 20001003) opens a dialog that scrolls an equip in the Equip tab. That dialog sends USE_UPGRADE_SCROLL with a positive slot and a last byte of 1 (reports/c018). Until now the server refused all of these requests.

• The request is accepted only from a player who has one of the three skills. It uses the same rules as a worn equip (fits, req, slots left, not cash), except that pet equipment (180xxxx) may pass the cash refusal, as the client's dialog allows.
• On success, the Equip-tab item is replaced. SHOW_SCROLL_EFFECT goes to the scroller and the map with the Legendary Spirit flag set. No look refresh is sent, because the item is not worn.
• On refusal (no skill, a worn slot, an empty slot, a misfit), the dialog gets SHOW_SCROLL_EFFECT -1 ("You cannot use a Scroll with this item."). Non-dialog requests behave as before.
• The HeavenClient dialog is a later slice; its RE (c022) is in progress.

Tests:

• New net unit tests: legendary_spirit_scrolls_a_sword_in_the_equip_tab and legendary_spirit_takes_only_the_equip_tab.
• New harness test: scrolls::legendary_spirit_scrolls_a_sword_in_the_equip_tab. It covers a refusal without the skill, a success with it, a refusal for a worn slot, and the upgrade being saved.
• The harness scroll helpers now filter by character, because two tests now scroll on the same map.