backport to 1.6 too

source/includes/toc/automation-agent-install.rst:3: WARNING: toctree contains reference to nonexisting document u'tutorial/install-automation-agent-from-archive'
source/tutorial/add-existing-host-to-automation.txt:: WARNING: document isn't included in any toctree
source/includes/toc/dfn-list-automation-agent-install.rst:12: WARNING: unknown document: /tutorial/install-automation-agent-from-archive
source/core/security.txt:57: ERROR: Undefined substitution referenced: "application".
source/core/security.txt:70: ERROR: Undefined substitution referenced: "application".
source/core/security.txt:102: ERROR: Undefined substitution referenced: "application".
source/core/security.txt:138: ERROR: Undefined substitution referenced: "application".
source/core/security.txt:167: ERROR: Undefined substitution referenced: "application".
source/core/security.txt:177: ERROR: Undefined substitution referenced: "application".
source/core/security.txt:204: ERROR: Undefined substitution referenced: "application".
source/troubleshooting.txt:424: ERROR: Undefined substitution referenced: "application".
source/includes/considerations-backup-agent-install.rst:24: ERROR: Undefined substitution referenced: "application".
source/core/security.txt:57: WARNING: unknown document: /tutorial/configure-ssl-connection-to-backing-mongodb
source/core/security.txt:70: WARNING: unknown document: /tutorial/configure-ssl-connection-to-web-interface
source/core/security.txt:96: WARNING: undefined label: enable-authentication (if the link has no caption the label must precede a section header)
source/core/security.txt:177: WARNING: unknown document: /tutorial/configure-for-ldap-authentication
source/core/security.txt:177: WARNING: undefined label: ldap-settings (if the link has no caption the label must precede a section header)
source/core/security.txt:204: WARNING: unknown document: /tutorial/prepare-backing-mongodb-instances
source/core/security.txt:204: WARNING: undefined label: configuration-kerberos-settings (if the link has no caption the label must precede a section header)
source/core/security.txt:235: WARNING: unknown document: /tutorial/manage-two-factor-authentication
source/core/security.txt:281: WARNING: unknown document: /tutorial/provision-aws-servers
source/core/security.txt:285: WARNING: unknown document: /tutorial/provision-aws-servers
source/core/security.txt:298: WARNING: undefined label: ssh-access-to-aws (if the link has no caption the label must precede a section header)
source/includes/fact-aws-settings-page.rst:4: WARNING: unknown document: /tutorial/provision-aws-servers
source/includes/fact-aws-settings-page.rst:7: WARNING: unknown document: /tutorial/provision-aws-servers
source/core/two-factor-authentication.txt:110: WARNING: unknown document: /tutorial/manage-two-factor-authentication
source/faq.txt:86: WARNING: unknown document: /tutorial/configure-aws-settings
source/faq.txt:92: WARNING: undefined label: security-group (if the link has no caption the label must precede a section header)
source/includes/troubleshooting-getting-started.rst:40: WARNING: undefined label: agent-logs (if the link has no caption the label must precede a section header)
source/troubleshooting.txt:53: WARNING: unknown document: /tutorial/unmanage-deployment
source/troubleshooting.txt:125: WARNING: undefined label: unmanage-deployment (if the link has no caption the label must precede a section header)
source/troubleshooting.txt:307: WARNING: unknown document: /tutorial/manage-two-factor-authentication
source/troubleshooting.txt:318: WARNING: undefined label: authentication-requirements (if the link has no caption the label must precede a section header)
source/troubleshooting.txt:348: WARNING: undefined label: backup-daemon (if the link has no caption the label must precede a section header)
source/troubleshooting.txt:424: WARNING: unknown document: /tutorial/prepare-backing-mongodb-instances
source/troubleshooting.txt:465: WARNING: undefined label: aws-checklist (if the link has no caption the label must precede a section header)
source/tutorial/add-existing-host-to-automation.txt:45: WARNING: unknown document: /tutorial/nav/install-automation-agent
source/includes/considerations-backup-agent-install.rst:24: WARNING: unknown document: /reference/configuration
source/tutorial/manage-users.txt:113: WARNING: unknown document: /tutorial/configure-for-ldap-authentication
source/tutorial/manage-users.txt:131: WARNING: unknown document: /tutorial/configure-for-ldap-authentication
source/tutorial/manage-users.txt:139: WARNING: unknown document: /tutorial/configure-for-ldap-authentication
source/tutorial/manage-users.txt:144: WARNING: unknown document: /tutorial/configure-for-ldap-authentication
source/tutorial/manage-users.txt:162: WARNING: unknown document: /reference/configuration
source/tutorial/view-replica-set-statistics.txt:25: WARNING: unknown document: /tutorial/edit-replica-set