patch 9.1.0045: --remote-* does not ignore `wilidignore`

Problem:  --remote-silent applies the wildignore option
          to each argument, which may result in "E479: No match"
          (hebaronson)
Solution: temporarily reset 'wildignore' setting when building
          the :drop command

closes: #13835

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_remote.vim b/src/testdir/test_remote.vim
new file mode 100644
index 0000000..ae931fd
--- /dev/null
+++ b/src/testdir/test_remote.vim
@@ -0,0 +1,79 @@
+" Test for the --remote functionality
+
+source check.vim
+CheckFeature clientserver
+CheckFeature terminal
+
+source shared.vim
+source screendump.vim
+source mouse.vim
+source term_util.vim
+
+let s:remote_works = 0
+let s:skip = 'Skipped: --remote feature is not possible'
+
+" nees to be run as first test to verify, that vim --servername works
+func Verify_remote_feature_works()
+  CheckRunVimInTerminal
+  enew
+  let buf = RunVimInTerminal('--servername XVIMTEST', {'rows': 8})
+  call TermWait(buf)
+  let cmd = GetVimCommandCleanTerm() .. '--serverlist'
+  call term_sendkeys(buf, ":r! " .. cmd .. "\<CR>")
+  call TermWait(buf)
+  call term_sendkeys(buf, ":w! XVimRemoteTest.txt\<CR>")
+  call TermWait(buf)
+  call term_sendkeys(buf, ":q\<CR>")
+  call StopVimInTerminal(buf)
+  bw!
+  let result = readfile('XVimRemoteTest.txt')
+  call delete('XVimRemoteTest.txt')
+  if empty(result)
+    throw s:skip
+  endif
+  let s:remote = 1
+endfunc
+
+call Verify_remote_feature_works()
+
+if !s:remote
+  finish
+endif
+
+func Test_remote_servername()
+  CheckRunVimInTerminal
+
+  " That is the file we want the server to open,
+  " despite the wildignore setting
+  call writefile(range(1, 20), 'XTEST.txt', 'D')
+  " just a dummy file, so that the ':wq' further down is successful
+  call writefile(range(1, 20), 'Xdummy.log', 'D')
+
+  " Run Vim in a terminal and open a terminal window to run Vim in.
+  let lines =<< trim END
+    set wildignore=*.txt
+  END
+  call writefile(lines, 'XRemoteEditing.vim', 'D')
+  let buf = RunVimInTerminal('--servername XVIMTEST -S XRemoteEditing.vim  Xdummy.log', {'rows': 8})
+  call TermWait(buf)
+  botright new
+  " wildignore setting should be ignored and the XVIMTEST server should now
+  " open XTEST.txt, if wildignore setting is not ignored, the server
+  " will continue with the Xdummy.log file
+  let buf2 = RunVimInTerminal('--servername XVIMTEST --remote-silent XTEST.txt', {'rows': 5, 'wait_for_ruler': 0})
+  " job should be no-longer running, so we can just close it
+  exe buf2 .. 'bw!'
+  call term_sendkeys(buf, ":sil :3,$d\<CR>")
+  call TermWait(buf)
+  call term_sendkeys(buf, ":wq!\<CR>")
+  call TermWait(buf)
+  if term_getstatus(buf) == 'running'
+    call StopVimInTerminal(buf)
+  endif
+  let buf_contents = readfile('XTEST.txt')
+  call assert_equal(2, len(buf_contents))
+  bw!
+  close
+endfunc
+
+" vim: shiftwidth=2 sts=2 expandtab