Merge branch 'bmk/megaco/flex_buffer_overrun_while_scanning_prop_parms/OTP-10998/r15' into maint-r15

* bmk/megaco/flex_buffer_overrun_while_scanning_prop_parms/OTP-10998/r15:
  [megaco] Used wrong downgrade tag for (flex) handler
  [megaco] Fixrd appup sub-test suite
  [megaco] Debug printouts in megaco test server
  [megaco] Internal test server not handling failing cases
  [megaco] Fix merge
  [megaco] Misc codec tickets test case fixes
  [megaco] Misc fixes of the (internal) megaco test server
  Changed name of test case functions (from seq12263 to otp10998)
  Assign correct version and updated release notes accordingly.
  Removed comments
  Ensure of incorrect number of terms when scanning property groups
  Uncommented test cases
  Add new messages
  Calculation of term_spec size (initial and next) changed
  Minor test case rework
  Test case cleanup
  Add rule for test beam'es
  Preliminary test case updates
Forbid unsized fields in patterns of binary generators

It makes no sense to be able to do `<<...,Rest/binary>> <= ...` in a
comprehension. The related Dialyzer test is removed.
Simplify v3_core's translation of bit string generators

Now that unsized binary segments are forbidden in patterns of bit string
generators, v3_core:append_tail_segment/2 does not need to check for an
existing unsized tail segment and can thus be changed to a simple '++'/2
call.
Bootstrap added
crypto: Fix some compiler warnings
crypto: Refactor remove resource for EC_KEY

The resource was not needed as it was never kept between external
crypto calls.
crypto: Supress some false positives from valgrind
httpc: Allow content body in DELETE requests
Update version numbers for R16B02 development
erts: Add new allocator strategy aoffcbf

with better performance than aoffcaobf as we don't have to rearrange
the search tree when there are blocks of equal size.
erts: Make aoffcbf default when migration is enabled
Merge branch 'sverk/aoffcbf' into maint

* sverk/aoffcbf:
  erts: Make aoffcbf default when migration is enabled
  erts: Add new allocator strategy aoffcbf

OTP-11174
Merge branch 'maint'

Conflicts:
	erts/vsn.mk
	lib/kernel/vsn.mk
	lib/stdlib/vsn.mk
Merge branch 'sverk/crypto-remove-ec-resource' into maint

* sverk/crypto-remove-ec-resource:
  crypto: Supress some false positives from valgrind
  crypto: Refactor remove resource for EC_KEY
  crypto: Fix some compiler warnings
Merge branch 'maint'
public_key: Make test cases independent of failure of other test cases
to clean up.
Merge branch 'ia/public_key/test-independency' into maint

* ia/public_key/test-independency:
  public_key: Make test cases independent of failure of other test cases to clean up.
Merge remote-tracking branch 'upstream/maint'
Merge branch 'nox/illegal-bitstring-gen-pattern/OTP-11186'

* nox/illegal-bitstring-gen-pattern/OTP-11186:
  Bootstrap added
  Simplify v3_core's translation of bit string generators
  Forbid unsized fields in patterns of binary generators
inets: removed obsolete code