Add back still useful test from fe7b01f (Resolve symlink if ...)

Add back still useful test from reverted commit:
  fe7b01f
  Resolve symlink if it is directly referenced in cli (#2897)

License: MIT
Signed-off-by: Kevin Atkinson <k@kevina.org>

test/sharness/t0044-add-symlink.sh

@@ -44,6 +44,16 @@ test_add_symlinks() {
  echo "QmWYN8SEXCgNT2PSjB6BnxAx6NJQtazWoBkTRH9GRfPFFQ" > badlink_exp &&
  test_cmp badlink_exp badlink_out
  '
+
+ test_expect_success "adding with symlink in middle of path is same as\
+adding with no symlink" '
+ mkdir -p files2/a/b/c &&
+ echo "some other text" > files2/a/b/c/foo &&
+ ln -s b files2/a/d
+ ipfs add -rq files2/a/b/c > no_sym &&
+ ipfs add -rq files2/a/d/c > sym &&
+ test_cmp no_sym sym
+ '
 }
 
 test_init_ipfs