vim-patch:9.1.1507: symlinks are resolved on :cd commands (#34758)

Problem:  File paths change from symlink to target path after :cd command
          when editing files through symbolic links
Solution: Add "~" flag to 'cpoptions' to control symlink resolution.
          When not included (default), symlinks are resolved maintaining
          backward compatibility. When included, symlinks are preserved
          providing the improved behavior. (glepnir)

related: neovim/neovim#15695
closes: vim/vim#17628

4ade668fb6

src/nvim/options.lua

@@ -2002,6 +2002,13 @@ local options = {
         		character, the cursor won't move. When not included,
         		the cursor would skip over it and jump to the
         		following occurrence.
+        							*cpo-~*
+        	~	When included, don't resolve symbolic links when
+        		changing directory with |:cd|, |:lcd|, or |:tcd|.
+        		This preserves the symbolic link path in buffer names
+        		and when displaying the current directory.  When
+        		excluded (default), symbolic links are resolved to
+        		their target paths.
         							*cpo-_*
         	_	When using |cw| on a word, do not include the
         		whitespace following the word in the motion.