to <socket.h>, when doing the test for socklen_t. Apparently OpenBSD has
it in <sys/types.h> and it causes a build failure later if we detect
that the type is not present.
ltmain.sh, and missing from subdirectories. Autoconf automatically looks
in the parent directory for these files. I had to copy the files
depcomp, ltmain.sh, and missing into the root of the source tree.