The command line options and documentations refer to "process",
"applications", etc. It's more natural to think and describe them as
"executables" instead.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

When wrapping process, the parameter for a local wrap is defined
by using a shell-like glob interface (*make for example).

So remove the parts that mentions the old behavior (absolute
 and relative paths comparison), before the changes
introduced in commit f6bf2c02

Also, drop obvious and thus useless comment about the wrapper when
it's expressed as a relative path
Signed-off-by: NRudá Moura <rmoura@redhat.com>

This is just a review followed by minor wording changes and some
heavier formatting changes.

Changes from v1:
* Wording changes suggested by Lucas.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

Since Avocado in our context is a proper name, and not really just
some fruit, let's refer to it using a capitalized word.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

Add documentation manual page part for the command line
feature `--wrapper`.
Signed-off-by: NRudá Moura <rmoura@redhat.com>