fix compile error when run xcode on case-sensive file system.
Merge pull request #2080 from biteforest/master

fix compile error with xcode on case-sensitive file system.
Fix typo in AUTHORS

Jianfeng Zhou (NetGragon) -> Jianfeng Zou (NetDragon)
Adding missing libraries to proper build on Slackware Linux

Signed-off-by: Rodrigo Goncalves de Oliveira <rodrigo.goncalves@openbossa.org>