Handle EINTR returned from apr_pollset_poll when a user suspends and then backgrounds the applications.
Handle EINTR returned from apr_pollset_poll when a user suspends and then
backgrounds the applications.

* context.c
  (serf_context_run): Treat APR_EINTR as APR_SUCCESS, so that the application
   will rerun the context.

muthusuba/serf,wzugang/serf,sworda/serf,justinweb/serf,blueszhangsh/serf,blueszhangsh/serf,liuzongquan/serf,Manouchehri/serf,krime/serf,TommyU/serf,blueszhangsh/serf,sworda/serf,blueszhangsh/serf,Manouchehri/serf,idomon/serf,wzugang/serf,Manouchehri/serf,TommyU/serf,krime/serf,idomon/serf,justinweb/serf,wzugang/serf,justinweb/serf,liuzongquan/serf,sworda/serf,idomon/serf,TommyU/serf,justinweb/serf,liuzongquan/serf,wzugang/serf,krime/serf,krime/serf,TommyU/serf,muthusuba/serf,idomon/serf,Manouchehri/serf,muthusuba/serf,muthusuba/serf,sworda/serf,liuzongquan/serf