added new ksu method to man page

removed runas refrences, because it was never implemented

docs/man/man1/ansible.1.asciidoc.in

@@ -69,7 +69,7 @@ Run commands in the background, killing the task after 'NUM' seconds.
 *--become-method=*'BECOME_METHOD'::
 
 Privilege escalation method to use (default=sudo),
-valid choices: [ sudo | su | pbrun | pfexec | runas | doas | dzdo ]
+valid choices: [ sudo | su | pbrun | pfexec | doas | dzdo | ksu ]
 
 *--become-user=*'BECOME_USER'::
 

lib/ansible/constants.py

@@ -216,9 +216,9 @@ DEFAULT_SUDO_FLAGS        = get_config(p, DEFAULTS, 'sudo_flags', 'ANSIBLE_SUDO_
 DEFAULT_ASK_SUDO_PASS     = get_config(p, DEFAULTS, 'ask_sudo_pass',    'ANSIBLE_ASK_SUDO_PASS',    False, boolean=True)
 
 # Become
-BECOME_ERROR_STRINGS      = {'sudo': 'Sorry, try again.', 'su': 'Authentication failure', 'pbrun': '', 'pfexec': '', 'runas': '', 'doas': 'Permission denied', 'dzdo': '', 'ksu': 'Password incorrect'} #FIXME: deal with i18n
-BECOME_MISSING_STRINGS    = {'sudo': 'sorry, a password is required to run sudo', 'su': '', 'pbrun': '', 'pfexec': '', 'runas': '', 'doas': 'Authorization required', 'dzdo': '', 'ksu': 'No password given'} #FIXME: deal with i18n
-BECOME_METHODS            = ['sudo','su','pbrun','pfexec','runas','doas','dzdo','ksu']
+BECOME_ERROR_STRINGS      = {'sudo': 'Sorry, try again.', 'su': 'Authentication failure', 'pbrun': '', 'pfexec': '', 'doas': 'Permission denied', 'dzdo': '', 'ksu': 'Password incorrect'} #FIXME: deal with i18n
+BECOME_MISSING_STRINGS    = {'sudo': 'sorry, a password is required to run sudo', 'su': '', 'pbrun': '', 'pfexec': '', 'doas': 'Authorization required', 'dzdo': '', 'ksu': 'No password given'} #FIXME: deal with i18n
+BECOME_METHODS            = ['sudo','su','pbrun','pfexec','doas','dzdo','ksu']
 BECOME_ALLOW_SAME_USER    = get_config(p, 'privilege_escalation', 'become_allow_same_user', 'ANSIBLE_BECOME_ALLOW_SAME_USER', False, boolean=True)
 DEFAULT_BECOME_METHOD     = get_config(p, 'privilege_escalation', 'become_method', 'ANSIBLE_BECOME_METHOD','sudo' if DEFAULT_SUDO else 'su' if DEFAULT_SU else 'sudo' ).lower()
 DEFAULT_BECOME            = get_config(p, 'privilege_escalation', 'become', 'ANSIBLE_BECOME',False, boolean=True)