Disable highlight ref by default (#492)

* disable highlight references by default since it is executes request on every cursor change

* update higlight text

* fix doc

Author: prabirshrestha

README.md

@@ -164,11 +164,11 @@ Virtual text will use the same highlight groups as signs feature.
 
 ### Highlight references
 
-References to the symbol under the cursor are highlighted by default. To
-disable, set in your configuration:
+Highlight references to the symbol under the cursor. To enable, set in your
+configuration:
 
 ```viml
-let g:lsp_highlight_references_enabled = 0
+let g:lsp_highlight_references_enabled = 1
 ```
 
 To change the style of the highlighting, you can set or link the `lspReference`

doc/vim-lsp.txt

@@ -405,7 +405,7 @@ g:lsp_use_event_queue                               *g:lsp_use_event_queue*
 
 g:lsp_highlight_references_enabled         *g:lsp_highlight_references_enabled*
     Type: |Number|
-    Default: `1`
+    Default: `0`
 
     Enable highlighting of the references to the symbol under the cursor.
 

plugin/lsp.vim

@@ -27,7 +27,7 @@ let g:lsp_preview_keep_focus = get(g:, 'lsp_preview_keep_focus', 1)
 let g:lsp_use_event_queue = get(g:, 'lsp_use_event_queue', has('nvim') || has('patch-8.1.0889'))
 let g:lsp_insert_text_enabled= get(g:, 'lsp_insert_text_enabled', 1)
 let g:lsp_text_edit_enabled = get(g:, 'lsp_text_edit_enabled', has('patch-8.0.1493'))
-let g:lsp_highlight_references_enabled = get(g:, 'lsp_highlight_references_enabled', 1)
+let g:lsp_highlight_references_enabled = get(g:, 'lsp_highlight_references_enabled', 0)
 let g:lsp_preview_float = get(g:, 'lsp_preview_float', 1)
 let g:lsp_preview_autoclose = get(g:, 'lsp_preview_autoclose', 1)
 let g:lsp_preview_doubletap = get(g:, 'lsp_preview_doubletap', [function('lsp#ui#vim#output#focuspreview')])