！函数名
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！Function: llAllowInventoryDrop( integer add );
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1参数
！• integer
add
–
boolean, If TRUE it allows anyone, even if they don't have modify rights to a prim, regardless of whether they are the owner or not, to drop items into that prim, If FALSE (default) inventory dropping can still be done, but it is restricted only to people with modify permissions to that prim
