Merge pull request #9 from kikidong/fix_for_avbot

Fix for avbot
update deCAPTCHA
Simplify cmake configuration process, automatically find openssl library, let's use MinGW to compile avbot a little more simple.
Add -static to LDFLAGS in MinGW build, so avbot would force link the static lib, such as libiconv.a but not link to libiconv.la that is the shared lib.
update avproxy
avboost update
pop3.hpp fix compile warning
延迟 报告新人入群. 30s 延时
relogin if vc resolve failed
qqbot qqnickmap 将有时获取失败的 nick 给设定一下。
maybe ready for 7.1 release
prepare for 7.1 release
fix win32 build not launching gui
fix 登录失败
check for login_sig
login to ptui4 ! to get pt4_token cookie
now login success!
fix make dist
Make autotools compile avbot happy;-)
add soci as submodule, build soci