HTTP/3: fixed build without NGX_PCRE (broken by 0f5fc7a320db).

[Jiuzhou Cui]

Hello!

# HG changeset patch
# User Jiuzhou Cui <cuijiuzhou at alibaba-inc.com>
# Date 1669360043 -28800
#      Fri Nov 25 15:07:23 2022 +0800
# Branch quic
# Node ID da7d9eb93afad52bd5b231501590535be9660d8c
# Parent  c6580dce98a8951fcecce2daa4b6bdbda8307bf7
HTTP/3: fixed build without NGX_PCRE (broken by 0f5fc7a320db).
ssl_servername_regex defined under macro NGX_PCRE.

diff -r c6580dce98a8 -r da7d9eb93afa src/http/v3/ngx_http_v3_request.c
--- a/src/http/v3/ngx_http_v3_request.c Wed Nov 23 18:50:26 2022 +0400
+++ b/src/http/v3/ngx_http_v3_request.c Fri Nov 25 15:07:23 2022 +0800
@@ -81,7 +81,9 @@

     if (phc->ssl_servername) {
         hc->ssl_servername = phc->ssl_servername;
+#if (NGX_PCRE)
         hc->ssl_servername_regex = phc->ssl_servername_regex;
+#endif
         hc->conf_ctx = phc->conf_ctx;

         ngx_set_connection_log(c, clcf->error_log);