* src/posix-io.c: Don't include ath.h.
(_gpgme_io_read): Call read directly.
(_gpgme_io_write): Call write directly.
(_gpgme_io_waitpid): Call waitpid directly.
(_gpgme_io_select_select): Call select directly.
(_gpgme_io_recvmsg): Call recvmsg directly.
(_gpgme_io_sendmsg): Call sendmsg directly.
(_gpgme_io_connect): Call connect directly.
* src/assuan-support.c: Don't include ath.h.
(my_waitpid): Call waitpid directly.