Changed tpf/os.c's tpf_select function to bump the passed select timeout value by 1 second.

This is needed because TPF's select waits between timeout-1 and timeout seconds.
Also renamed 'timeout' variable to clarify when it is used for seconds vs. milliseconds.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@156700 13f79535-47bb-0310-9956-ffa450edef68