Revert "Fix: explicitly remove src.old from tarball"

noinst_DIST actually adds file to the tarball and seems not working with
subdirs.

This reverts commit 293d484d94d40fcf610d71de635c4c0c7e4af463.
Fix: add missing errno to handle non-blocking connect()

Fixes #16

Reported-by: adrelanos <adrelanos@riseup.net>
Signed-off-by: David Goulet <dgoulet@ev0ke.net>