Reverse zones: other views' addresses aren't missing PTRs

A reverse zone's missing PTR count covers only its own view's A and
AAAA records. Addresses only other views' records use are counted apart
(ptr_other_views, 'Other views' in zone show, a note on the zone page)
and filled only when asked: fill-ptr --other-views, zone create
--fill --other-views, or the New reverse zone dialog's checkbox. This
keeps one view's host names out of another view's reverse zones.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/e2e.sh

@@ -703,6 +703,20 @@ run "fill-ptr" 0 $J zone fill-ptr fdab:99::/48
 expect_dig "filled later: IPv6 PTR" "nas.revtest.test." -x fdab:99:0:10::10
 run "fill-ptr again: nothing to add (exit 6)" 6 $J zone fill-ptr fdab:99::/48
 contains "nothing to add"
+# The same network in another view: internal's hosts aren't missing there,
+# and are named from internal only when asked.
+run "the network in external too, filled" 0 $J zone create 10.99.1.0/24 --view external --fill
+contains "only other views' records use"
+run "nothing missing there" 0 $J zone show 1.99.10.in-addr.arpa --view external
+not_contains "Missing PTRs"
+contains "^Other views:  *2 addresses"
+run "fill-ptr there: nothing of its own (exit 6)" 6 $J zone fill-ptr 10.99.1.0/24 --view external
+contains "--other-views"
+run "fill-ptr --other-views" 0 $J zone fill-ptr 10.99.1.0/24 --view external --other-views
+contains "only view internal has a record for it"
+run "now named there" 0 $J record list 1.99.10.in-addr.arpa --view external
+contains "pi.revtest.test"
+run "drop the external copy" 0 $J zone delete 1.99.10.in-addr.arpa --view external --yes
 run "keep PTRs in step" 0 $J zone update revtest.test --view internal --auto-ptr
 run "zone show says so" 0 $J zone show revtest.test --view internal
 contains "^PTR records:  *kept in step"
@@ -736,7 +750,7 @@ run "and back on" 0 $J view update internal --reverse-suggestions
 run "an AAAA only in external" 0 $J record add adbraun.test vps AAAA 2600:3c01::f03c:93ff:fe2b:1 --view external
 run "offered for internal" 0 $J zone suggest-reverse --all --view internal
 contains "2600:3c01::f03c:93ff:fe2b:1/128 .*records in external"
-run "created in internal, filled from external's record" 0 $J zone create 2600:3c01::f03c:93ff:fe2b:1/128 --view internal --fill
+run "created in internal, filled from external's record" 0 $J zone create 2600:3c01::f03c:93ff:fe2b:1/128 --view internal --fill --other-views
 expect_dig "internal answers its PTR" "vps.adbraun.test." -x 2600:3c01::f03c:93ff:fe2b:1
 # A zone created inside another takes the parent's records under it.
 run "a /16 reverse zone" 0 $J zone create 10.88.0.0/16 --view internal