Description of problem:
Installing ipa server using zonemgr option which includes special chars fails
to install the server. A preinstall check would avoid the install to begin in
this scenario.

Installed using -
ipa-server-install --setup-dns --no-forwarders --zonemgr=Têko@redhat.com

This failed with error - 
Configuring named:
  [1/9]: adding DNS container
  [2/9]: setting up our zone
Unexpected error - see ipaserver-install.log for details:
 idnsSOArName: value #0 invalid per syntax: Invalid syntax.


I was able to successfully uninstall after the above.

Version-Release number of selected component (if applicable):
ipa-server-2.0.0-19.el6.x86_64

How reproducible:
always

Steps to Reproduce:
1.Install using cmd: 
ipa-server-install --setup-dns --no-forwarders --zonemgr=Têko@redhat.com


Actual results:
Install started, and went through setting up DS, CS etc, and then failed with
error
idnsSOArName: value #0 invalid per syntax: Invalid syntax.



Expected results:
If i have an invalid value for zonemgr, do not start the install.