Comment 7 for bug 483928

Created attachment 1969
Fix(?) for premature ssh-keyscan abort.

This adds a local/static `cleanup_exit()' function to ssh-keyscan so that aborts in non-ssh-keyscan code can be converted to "continue"s while the `dispatch_run()' function is being executed. It mimics the already extant local/static `fatal()' function in using `exit()' instead of the `_exit()' used in the default cleanup.c.

Two observations:
1) I also incremented the `howmany()' argument #1 count by 1. This is probably unnecessary but I note that all other occasions where `howmany()' is used do this (and I'm chicken ...).
2) The current local/static `fatal()' function could possibly be removed and the default one, defined in fatal.c, be used.