fix some bugs, optimize some other things

nfs-client/tasks/umask.yml

@@ -8,7 +8,7 @@
     - config
 
 - name: activate pam.d session modules to set default umask
-  lineinfile: dest=/etc/pam.d/common-session line=session optional                        pam_umask.so
+  lineinfile: dest=/etc/pam.d/common-session line="session optional                        pam_umask.so"
   tags:
     - umask
     - pam