1. Correct some mangling of the linked list pointers that

1. Correct some mangling of the linked list pointers that
keep track of child processes.

2. Rearrange the way we we keep track of how many children we
have.  The old way was a little dodgy in some situations.

3. Plug some memory leaks in osrf_prefork_register_routers().

4. Add more doxygen-style comments.

M    src/libopensrf/osrf_prefork.c

git-svn-id: svn://svn.open-ils.org/OpenSRF/trunk@1897 9efc2488-bf62-4759-914b-345cdb29e865