#4607 No conflicts with nvim-lspconfig by default

Default `g:ale_disable_lsp` to a new mode `'auto'` by default. With this
setting applied, ALE will now check for the presence of nvim-lspconfig
and automatically turn off particular LSP linters if already configured
via nvim-lspconfig.

For users that do not use `nvim-lspconfig`, everything should work as
before.

ale_linters/html/angular.vim

@@ -48,7 +48,7 @@ endfunction
 
 call ale#linter#Define('html', {
 \   'name': 'angular',
-\   'aliases': ['angular-language-server'],
+\   'aliases': ['angular-language-server', 'angularls'],
 \   'lsp': 'stdio',
 \   'executable': function('ale_linters#html#angular#GetExecutable'),
 \   'command': function('ale_linters#html#angular#GetCommand'),