Add disabled flag

plugin/lsp_settings.vim

@@ -200,6 +200,9 @@ function! s:vimlsp_load_or_suggest(ft) abort
   let l:found = 0
 
   for l:server in s:settings[a:ft]
+    if s:vimlsp_settings_get(l:server.command, 'disabled', 0)
+      continue
+    endif
     let l:command = s:vimlsp_settings_get(l:server.command, 'cmd', l:server.command)
     if type(l:command) == type([])
       let l:command = l:command[0]

settings.json

@@ -426,6 +426,14 @@
       ]
     }
   ],
+  "perl": [
+    {
+      "command": "perl-languageserver",
+      "requires": [
+        "cpanm"
+      ]
+    }
+  ],
   "yaml": [
     {
       "command": "yaml-language-server",