Fix resolve_symlink to save the original symlink name if known.

Fix resolve_symlink to save the original symlink name if known.

We would previously receive APR_INCOMPLETE on symlinks if wanted has
FINFO_NAME set because it isn't supported via apr_stat().  Furthermore, we
don't care what the real name is anyway (even if it apr_stat returned
.name) - we want to call it by the name the symlink says it is.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@93328 13f79535-47bb-0310-9956-ffa450edef68