set_svr_stub清理共享内存的时候core
根据平台设置pthread库
net_trans支持设置不重用连接
Merge commit 'refs/top-bases/t/svr/env' into t/svr/env
Merge commit 'refs/top-bases/t/svr/rank_f' into t/svr/rank_f
dr_pbuf_write修改bug
Merge branch 't/support/dr2' into refs/top-bases/t/support/game
Merge commit 'refs/top-bases/t/support/game' into t/support/game
Merge commit 'refs/top-bases/t/svr/env' into t/svr/env
Merge commit 'refs/top-bases/t/svr/rank_f' into t/svr/rank_f