The invalidset and invalidtext tests loaded an input file via table
and event reads, in parallel. On FreeBSD this triggers an occasional
reordering of messages coming out of the reader thread vs the input
managers. This commit makes the table and event reads sequential,
avoiding the race.
This also installs symlinks from "zeek" and "bro-config" to a wrapper
script that prints a deprecation warning.
The btests pass, but this is still WIP. broctl renaming is still
missing.
#239