Allow insecure connections to Gitlab (#234)

This MR makes it possible to ignore bad x509 certificates when connecting to Gitlab, by creating a custom HTTP connection. The option is exposed via the setup function. This is a PATCH release.

lua/gitlab/server.lua

@@ -13,19 +13,16 @@ M.start = function(callback)
   local port = state.settings.port or empty_port
   local parsed_port = nil
   local callback_called = false
-  local command = state.settings.bin
-    .. " "
-    .. state.settings.gitlab_url
-    .. " "
-    .. port
-    .. " "
-    .. state.settings.auth_token
-    .. " "
-    .. "'"
-    .. vim.json.encode(state.settings.debug)
-    .. "'"
-    .. " "
-    .. state.settings.log_path
+  local command = string.format(
+    "%s %s %s %s '%s' %s '%s'",
+    state.settings.bin,
+    state.settings.gitlab_url,
+    port,
+    state.settings.auth_token,
+    vim.json.encode(state.settings.debug),
+    state.settings.log_path,
+    vim.json.encode(state.settings.connection_settings)
+  )
 
   local job_id = vim.fn.jobstart(command, {
     on_stdout = function(_, data)

lua/gitlab/state.lua

@@ -20,6 +20,9 @@ M.settings = {
       imply_local = false,
     },
   },
+  connection_settings = {
+    insecure = true,
+  },
   attachment_dir = "",
   help = "g?",
   popup = {