* Bug Fixes:

-- Added itemstack check when init autotrader (bugreport:9077)
-- 'getitem' issue, gave unidentified item (bugreport:9075), follow up 62a2813
-- Invalid Def & Mdef reduction of SC_ARMORCHANGE & duration (NPC_STONESKIN & NPC_ANTIMAGIC), should be percentage (bugreport:9076)
-- Invalid Effect duration & Reflect chance of SC_MAGICMIRROR (NPC_MAGICMIRROR)
-- Wrong usage of script_isstring() for script commands: addspiritball, delspiritball, & countspiritball
* Misc:
-- Moved mail send progress to mail.c mail_send() from clif.c clif_parse_Mail_send()
-- Moved hardcoded flood protection when send a mail to 'mail_delay' in misc.conf

Signed-off-by: Cydh Ramdh <house.bad@gmail.com>