Eliminated the function pointer osrf_stack_entry_point so that

Eliminated the function pointer osrf_stack_entry_point so that
osrf_app_session_queue_wait() can call osrf_stack_process() directly.
This change entails some juggling of declarations, headers, and the
like, but does not substantively affect the processing.

Also: made a number of other minor changes, mostly to comments
and white space.

M    include/opensrf/osrf_stack.h
M    include/opensrf/osrf_app_session.h
M    src/libopensrf/osrf_app_session.c
M    src/libopensrf/osrf_stack.c

git-svn-id: svn://svn.open-ils.org/OpenSRF/trunk@1868 9efc2488-bf62-4759-914b-345cdb29e865