Be more clear about selfsign option

Installing IPA server --selfsign option is currently a one-way ticket
to server with limited certificate capabilities. Make sure that user
really want to install it by implementing the following steps:

- moving the option to the bottom of certificate options section
- adding a warning to ipa-server-install man page
- adding a warning to ipa-server-install help
- adding a warning to ipa-server-install configuration summary
  when one runs ipa-server-install

https://fedorahosted.org/freeipa/ticket/1908

install/tools/ipa-server-install

@@ -141,8 +141,6 @@ def parse_options():
     parser.add_option_group(basic_group)
 
     cert_group = OptionGroup(parser, "certificate system options")
-    cert_group.add_option("", "--selfsign", dest="selfsign", action="store_true",
-                      default=False, help="Configure a self-signed CA instance rather than a dogtag CA")
     cert_group.add_option("", "--external-ca", dest="external_ca", action="store_true",
                       default=False, help="Generate a CSR to be signed by an external CA")
     cert_group.add_option("", "--external_cert_file", dest="external_cert_file",
@@ -166,6 +164,9 @@ def parse_options():
     cert_group.add_option("--subject", action="callback", callback=subject_callback,
                       type="string",
                       help="The certificate subject base (default O=<realm-name>)")
+    cert_group.add_option("", "--selfsign", dest="selfsign", action="store_true",
+                      default=False, help="Configure a self-signed CA instance rather than a dogtag CA. " \
+                      "WARNING: Certificate management capabilities will be limited")
     parser.add_option_group(cert_group)
 
     dns_group = OptionGroup(parser, "DNS options")
@@ -667,6 +668,11 @@ def main():
     print "This program will set up the FreeIPA Server."
     print ""
     print "This includes:"
+    if options.selfsign:
+        print "  * Configure NSS to handle a self-signed CA"
+        print "    WARNING: certificate management capabilities will be limited"
+    else:
+        print "  * Configure a stand-alone CA (dogtag) for certificate management"
     if options.conf_ntp:
         print "  * Configure the Network Time Daemon (ntpd)"
     print "  * Create and configure an instance of Directory Server"

install/tools/man/ipa-server-install.1

@@ -72,9 +72,6 @@ An unattended installation that will never prompt for user input
 
 .SS "CERTIFICATE SYSTEM OPTIONS"
 .TP
-\fB\-\-selfsign\fR
-Configure a self\-signed CA instance for issuing server certificates instead of using dogtag for certificates
-.TP
 \fB\-\-external\-ca\fR
 Generate a CSR to be signed by an external CA
 .TP
@@ -107,6 +104,11 @@ The password of the Kerberos KDC PKCS#12 file
 .TP
 \fB\-\-subject\fR=\fISUBJECT\fR
 The certificate subject base (default O=REALM.NAME)
+.TP
+\fB\-\-selfsign\fR
+Configure a self\-signed CA instance for issuing server certificates instead of using dogtag for certificates.
+
+WARNING: Using this option will restrain the server certificate management capabilities. Please, keep in mind that there is no way to change this setting later.
 
 .SS "DNS OPTIONS"
 .TP