Fix remote diameter_request table leak

An outgoing request whose pick_peer callback selected a transport on
another node resulted in an orphaned diameter_request entry on that
node.
Fix handling of 3xxx Result-Code without E-bit

Commit 00584303 broke the population of the errors field of the
diameter_packet record when an incoming request with an
E-bit/Result-Code mismatch was decoded. Instead of the intended

  {5004, #diameter_avp{value = integer()}},

the value was a 4-tuple containing the integer Result-Code.
Rename reconnect_timer to connect_timer in examples and suites

The timer was renamed in commit abea7186.
Check {connect,watchdog}_timer distinction in event testcases

The connect timer is currently ignored by a connecting transport,
so the check causes one testcase to fail.
Fix ignored connect timer

There are two timers governing the establishment of peer connections:
connect_timer and watchdog_timer. The former is the RFC 6733 Tc timer
and is used by diameter_service to establish an initial connection. The
latter is RFC 3539 TwInit and is used by diameter_watchdog for
connection reestablishment after the watchdog leaves state INITIAL. A
connecting transport ignored the connect timer since the watchdog
process never died, regardless of the watchdog state, causing the
watchdog timer to handle reconnection.

This seems to have been broken for some time.
Tweak reason in closed event

From {error, Reason} to {no_connection, Reason} when a connection can't
be established. The exit reason of a diameter_peer_fsm process is turned
into a message from the corresponding diameter_watchdog process to the
relevant diameter_service process, the latter sending a 'closed' event
including the reason to any subscribers. Reason = [] when none of the
configured transport modules succeeds in establishing a connection,
which admittedly isn't terribly descriptive. (The lists is of error
reasons from transport start functions, which is empty as long as
transport processes start successfully.)

Note that this form of the closed event is undocumented, aside from the
documentation saying that one should expect undocumented events. The
explicitly documented forms are currently specific to CER/CEA failures.
Order peers in pick_peer callbacks

The order of peers presented to a diameter_app(3) pick_peer callback has
previously not been documented, but there are use cases that are
simplified by an ordering. For example, consider preferring a direct
connection to a specified Destination-Host/Realm to any host in the
realm. The implementation previously treated this as a special case by
placing matching hosts at the head of the peers list, but the
documentation made no guarantees. Now present peers in match-order, so
that the desired sorting is the result of the following filter.

  {any, [{all, [host, realm]}, realm]}

The implementation is not backwards compatible in the sense that a realm
filter alone is no longer equivalent in this case. However, as stated,
the documentation never made any guarantees regarding the sorting.
Fix minor eprof and fprof doc issues
dict(3): fix typo reported by Rabbe Fogelholm
[snmp/compiler] Refinement of type Opaque was not allowed
MIB constructs such as "SYNTAX Opaque (SIZE(0..65535))" was
previously not allowed, this has now been fixed.
See the standard ALARM-MIB for eaxmple.
Merge branch 'anders/diameter/request_leak/OTP-12196' into maint

* anders/diameter/request_leak/OTP-12196:
  Fix remote diameter_request table leak
Merge branch 'anders/diameter/3xxx/OTP-12233' into maint

* anders/diameter/3xxx/OTP-12233:
  Fix handling of 3xxx Result-Code without E-bit
Merge branch 'anders/diameter/connect_timer/OTP-12281' into maint

* anders/diameter/connect_timer/OTP-12281:
  Tweak reason in closed event
  Fix ignored connect timer
  Check {connect,watchdog}_timer distinction in event testcases
  Rename reconnect_timer to connect_timer in examples and suites
Merge branch 'anders/diameter/filters/OTP-12308' into maint

* anders/diameter/filters/OTP-12308:
  Order peers in pick_peer callbacks
Merge branch 'maint'
ssh: prepares appup file for release
Merge branch 'hans/ssh/appup' into maint

* hans/ssh/appup:
  ssh: prepares appup file for release
Merge branch 'maint'

* maint:
  ssh: prepares appup file for release
inets: Prepare for release
ssl: Change code to reflect that state data may be secret