hosts/linux: escape regular expression for prune NFS exports [GH-2934]

CHANGELOG.md

@@ -88,6 +88,8 @@ BUG FIXES:
   - hosts/bsd: Don't invoke shell for NFS sudo calls. [GH-2808]
   - hosts/bsd: Sort NFS exports to avoid false validation errors. [GH-2927]
   - hosts/gentoo: Look for systemctl in `/usr/bin` [GH-2858]
+  - hosts/linux: Properly escape regular expression to prune NFS exports,
+    allowing VMware to work properly. [GH-2934]
   - hosts/opensuse: Start NFS server properly. [GH-2923]
   - providers/virtualbox: Enabling internal networks by just setting "true"
     works properly. [GH-2751]

plugins/hosts/linux/cap/nfs.rb

@@ -89,7 +89,8 @@ module VagrantPlugins
         def self.nfs_cleanup(id)
           return if !File.exist?("/etc/exports")
 
-          user = Process.uid
+          user = Regexp.escape(Process.uid.to_s)
+          id   = Regexp.escape(id.to_s)
 
           # Use sed to just strip out the block of code which was inserted
           # by Vagrant