Previously, mosh used extensive -I flags and all of the mosh-local
makes it really hard to tell what the proper dependency graph is, so
instead remove the -I arguments in favvor of $(top_srcdir) and qualify
the paths wherever they are used.
None of the previous tests even ran the mosh script unless tmux ≥ 1.8 is
installed. Thus ‘make check’ was “passing” on, e.g., RHEL 6 even though
its Perl is too old (5.10.1).
Signed-off-by: Anders Kaseorg <andersk@mit.edu>