Change default hostname autodetection parameters

Author: vkarak

docs/manpage.rst

@@ -1032,7 +1032,7 @@ Here is an alphabetical list of the environment variables recognized by ReFrame:
 .. envvar:: RFM_AUTODETECT_FQDN
 
    Use the fully qualified domain name as the hostname.
-   This is a boolean variable and defaults to ``1``.
+   This is a boolean variable and defaults to ``0``.
 
 
    .. table::
@@ -1046,6 +1046,9 @@ Here is an alphabetical list of the environment variables recognized by ReFrame:
 
    .. versionadded:: 3.11.0
 
+   .. versionchanged:: 4.0.0
+      This variable now defaults to ``0``.
+
 
 .. envvar:: RFM_AUTODETECT_METHOD
 
@@ -1071,7 +1074,7 @@ Here is an alphabetical list of the environment variables recognized by ReFrame:
 
    Use ``/etc/xthostname`` file, if present, to retrieve the current system's name.
    If the file cannot be found, the hostname will be retrieved using the ``hostname`` command.
-   This is a boolean variable and defaults to ``1``.
+   This is a boolean variable and defaults to ``0``.
 
    This option meaningful for Cray systems.
 
@@ -1086,6 +1089,8 @@ Here is an alphabetical list of the environment variables recognized by ReFrame:
 
    .. versionadded:: 3.11.0
 
+   .. versionchanged:: 4.0.0
+      This variable now defaults to ``0``.
 
 .. envvar:: RFM_CHECK_SEARCH_PATH
 

reframe/frontend/cli.py

@@ -555,9 +555,9 @@ def main():
         dest='autodetect_fqdn',
         envvar='RFM_AUTODETECT_FQDN',
         action='store',
-        default=True,
+        default=False,
         type=typ.Bool,
-        help='Use FQDN as host name'
+        help='Use the full qualified domain name as host name'
     )
     argparser.add_argument(
         dest='autodetect_method',
@@ -570,9 +570,9 @@ def main():
         dest='autodetect_xthostname',
         envvar='RFM_AUTODETECT_XTHOSTNAME',
         action='store',
-        default=True,
+        default=False,
         type=typ.Bool,
-        help="Use Cray's xthostname file to find the host name"
+        help="Use Cray's xthostname file to retrieve the host name"
     )
     argparser.add_argument(
         dest='git_timeout',