Description of problem:
iptables.init and ip6tables.init fails when dash is installed as /bin/sh .   The problem is that both files require bash to be the shell, but both files start out with #!/bin/sh implying that any posix shell will work.

Version-Release number of selected component (if applicable):

bash.x86_64                   4.2.48-2.fc20         @updates                    
dash.x86_64                   0.5.7-8.fc20          @fedora                     
iptables.x86_64               1.4.19.1-1.fc20       @koji-override-0/$releasever
iptables-services.x86_64      1.4.19.1-1.fc20       @fedora                     

How reproducible:
always

Steps to Reproduce:
1. yum install dash
2. cd /bin ; ln -sf dash sh
3. systemd restart iptables ; systemd restart ip6tables

Actual results:
iptables loading fails

Expected results:
iptables loading doesn't fail

Additional info:

diff -c /usr/libexec/iptables/iptables.init\~ /usr/libexec/iptables/iptables.in\
it                                                                              
*** /usr/libexec/iptables/iptables.init~        2013-07-31 11:39:16.000000000 -\
0700                                                                            
--- /usr/libexec/iptables/iptables.init 2014-09-28 03:02:26.693176459 -0700     
***************
*** 1,4 ****
! #!/bin/sh                                                                     
  #                                                                             
  # iptables    Start iptables firewall                                         
  #                                                                             
--- 1,4 ----
! #!/bin/bash                                                                   
  #                                                                             
  # iptables    Start iptables firewall                                         
  #                                                                             
                                                                                
Diff finished.  Sun Sep 28 11:45:52 2014                                        

diff -c /usr/libexec/iptables/ip6tables.init\~ /usr/libexec/iptables/ip6tables.\
init                                                                            
*** /usr/libexec/iptables/ip6tables.init~       2013-07-31 11:39:16.000000000 -\
0700                                                                            
--- /usr/libexec/iptables/ip6tables.init        2014-09-28 03:04:43.213630168 -\
0700                                                                            
***************
*** 1,4 ****
! #!/bin/sh                                                                     
  #                                                                             
  # ip6tables   Start ip6tables firewall                                        
  #                                                                             
--- 1,4 ----
! #!/bin/bash                                                                   
  #                                                                             
  # ip6tables   Start ip6tables firewall                                        
  #                                                                             
                                                                                
Diff finished.  Sun Sep 28 11:45:24 2014