Fixed Bug#8215
-http://hercules.ws/board/tracker/issue-8215-raido-rune-crushing-strike/?gopid=22895#entry22895
Signed-off-by: malufett <malufett.eat.my.binaries@gmail.com>
Merge branch 'master' of https://github.com/HerculesWS/Hercules
Update rAthena-main-upgrade.sql

Following up 3591de7e7ac2db4e3eeaa9bad2615648e7f94b3a. Upgrader should be up to date as of now.
Minor spelling correction in agit_main.txt
Merge pull request #288 from pois8n/master

Minor spelling correction in agit_main.txt
Fixed issue in *guildskill, lvl could be set to negative values. (issue: 8214) http://hercules.ws/board/tracker/issue-8214-guildskill-lead-to-negative-guild-skill-level/
Fixed issue in [AT](un)jail when jailing players in sec_pri (issue: 8206) http://hercules.ws/board/tracker/issue-8206-jail-bug/
Improved CFLAGS/CPPFLAGS handling

- Language extensions, such as _GNU_SOURCE are now enabled through
  CPPFLAGS by the configure script, rather than within the source code.
- Moved some configure-time CFLAGS to CPPFLAGS, where appropriate.
- Fixes bugreport:8211, thanks to Neoth
  http://hercules.ws/board/tracker/issue-8211-compiling-warning-in-linux

Signed-off-by: Haru <haru@dotalux.com>