cpu_linux: remove redundant casts.
Merge branch 'V5-7-patches'

* V5-7-patches:
  cpu_linux: remove redundant casts.
test T027: make sure it works also when configured with --with-default-snmp-version != 3.
Merge branch 'V5-7-patches'

* V5-7-patches:
  test T027: make sure it works also when configured with --with-default-snmp-version != 3.
Update options lists in manual pages and commands help.
Merge branch 'V5-7-patches'

* V5-7-patches:
  Update options lists in manual pages and commands help.