BIND 10 #3079: Don't build and install memmgr where shared memory support is not available

[BIND 10 Development]

#3079: Don't build and install memmgr where shared memory support is not available
-------------------------------------+-------------------------------------
                   Reporter:  muks   |                 Owner:
                       Type:         |                Status:  new
  defect                             |             Milestone:  Next-Sprint-
                   Priority:         |  Proposed
  medium                             |              Keywords:
                  Component:  shmem  |             Sensitive:  0
  manager                            |           Sub-Project:  DNS
               CVSS Scoring:         |  Estimated Difficulty:  0
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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 There is no purpose for `memmgr` on platforms where shared memory support
 is unavailable. In these cases we decided that the rest of the codebase
 should work properly without a running `memmgr` component.

 On these platforms, as `memmgr` cannot be run (or tested) anyway, we
 should not make or install it on such platforms. This probably also
 includes the `isc.memmgr` module. Please check.

 Marking it as a defect, as it's possible that a broken `memmgr` will cause
 build or check failures on such platforms when further shared memory
 tickets are implemented.

-- 
Ticket URL: <http://bind10.isc.org/ticket/3079>
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