nvim: change server socket fallback to user dir

.config/nvim/lua/my/net.lua

@@ -1,7 +1,8 @@
 require('my/plugins')
 
-local serversock = string.format("%s/nvim.%s.sock",
-    vim.env['XDG_RUNTIME_DIR'] or '/tmp', vim.env['USER'])
+local serversock = (
+    vim.env['XDG_RUNTIME_DIR'] or vim.env['XDG_STATE_HOME'] or
+        vim.env['HOME'] .. '/.local/state') .. '/nvim.sock'
 if vim.fn.filereadable(serversock) == 0 then
     vim.fn.serverstart(serversock);
 end

.config/zsh/.zprofile

@@ -22,8 +22,8 @@ if type nvim >& -; then
         # Open files from :terminal in parent instance
         VISUAL="${VISUAL} --server ${NVIM} --remote"
     else
-        VISUAL="$(command -v nvim) \
-            --server ${XDG_RUNTIME_DIR:-/tmp}/nvim.${USER}.sock"
+        local sockdir="${XDG_RUNTIME_DIR:-${XDG_STATE_HOME:-${HOME}/.local/state}}"
+        VISUAL="$(command -v nvim) --server ${sockdir}/nvim.sock"
     fi
 elif command -v emacsclient > /dev/null; then
     # Add Defaults env_keep += "SSH_CONNECTION" to /etc/sudoers.d/ssh_vars