Tests: skip ssl_conf_command tests with BoringSSL.

BoringSSL pretends to be OpenSSL 1.1.1, this confuses existing skip_all checks.
diff --git a/mail_ssl_conf_command.t b/mail_ssl_conf_command.t
index ba385ed..28f28bd 100644
--- a/mail_ssl_conf_command.t
+++ b/mail_ssl_conf_command.t
@@ -35,6 +35,7 @@
 
 $t->{_configure_args} =~ /OpenSSL ([\d\.]+)/;
 plan(skip_all => 'OpenSSL too old') unless defined $1 and $1 ge '1.0.2';
+plan(skip_all => 'no ssl_conf_command') if $t->has_module('BoringSSL');
 
 $t->write_file_expand('nginx.conf', <<'EOF');
 
diff --git a/proxy_ssl_conf_command.t b/proxy_ssl_conf_command.t
index b2d37fd..61f8c77 100644
--- a/proxy_ssl_conf_command.t
+++ b/proxy_ssl_conf_command.t
@@ -27,6 +27,7 @@
 
 $t->{_configure_args} =~ /OpenSSL ([\d\.]+)/;
 plan(skip_all => 'OpenSSL too old') unless defined $1 and $1 ge '1.0.2';
+plan(skip_all => 'no ssl_conf_command') if $t->has_module('BoringSSL');
 
 $t->write_file_expand('nginx.conf', <<'EOF');
 
diff --git a/ssl_conf_command.t b/ssl_conf_command.t
index 766c533..4a79a6d 100644
--- a/ssl_conf_command.t
+++ b/ssl_conf_command.t
@@ -35,6 +35,7 @@
 
 $t->{_configure_args} =~ /OpenSSL ([\d\.]+)/;
 plan(skip_all => 'OpenSSL too old') unless defined $1 and $1 ge '1.0.2';
+plan(skip_all => 'no ssl_conf_command') if $t->has_module('BoringSSL');
 
 $t->write_file_expand('nginx.conf', <<'EOF');
 
diff --git a/stream_proxy_ssl_conf_command.t b/stream_proxy_ssl_conf_command.t
index e2db3e9..3ecf2a2 100644
--- a/stream_proxy_ssl_conf_command.t
+++ b/stream_proxy_ssl_conf_command.t
@@ -28,6 +28,7 @@
 
 $t->{_configure_args} =~ /OpenSSL ([\d\.]+)/;
 plan(skip_all => 'OpenSSL too old') unless defined $1 and $1 ge '1.0.2';
+plan(skip_all => 'no ssl_conf_command') if $t->has_module('BoringSSL');
 
 $t->write_file_expand('nginx.conf', <<'EOF');
 
diff --git a/stream_ssl_conf_command.t b/stream_ssl_conf_command.t
index bf03783..cedfd5d 100644
--- a/stream_ssl_conf_command.t
+++ b/stream_ssl_conf_command.t
@@ -35,6 +35,7 @@
 
 $t->{_configure_args} =~ /OpenSSL ([\d\.]+)/;
 plan(skip_all => 'OpenSSL too old') unless defined $1 and $1 ge '1.0.2';
+plan(skip_all => 'no ssl_conf_command') if $t->has_module('BoringSSL');
 
 $t->write_file_expand('nginx.conf', <<'EOF');