nginx: ignore group

Otherwise it fails when trying to run as root. This works in my simple tests

packages/nginx/build.sh

@@ -2,7 +2,7 @@ TERMUX_PKG_HOMEPAGE=https://www.nginx.org
 TERMUX_PKG_DESCRIPTION="Lightweight HTTP server"
 TERMUX_PKG_LICENSE="BSD 2-Clause"
 TERMUX_PKG_VERSION=1.18.0
-TERMUX_PKG_REVISION=1
+TERMUX_PKG_REVISION=2
 TERMUX_PKG_SRCURL=http://nginx.org/download/nginx-$TERMUX_PKG_VERSION.tar.gz
 TERMUX_PKG_SHA256=4c373e7ab5bf91d34a4f11a0c9496561061ba5eee6020db272a17a7228d35f99
 TERMUX_PKG_DEPENDS="libandroid-glob, libcrypt, pcre, openssl, zlib"

packages/nginx/nginx.c.patch

@@ -0,0 +1,18 @@
+--- ../nginx.c.orig	2020-05-20 16:18:15.028740536 +0200
++++ ./src/core/nginx.c	2020-05-20 16:17:58.883365526 +0200
+@@ -1115,14 +1115,8 @@
+         ccf->user = pwd->pw_uid;
+ 
+         ngx_set_errno(0);
+-        grp = getgrnam(NGX_GROUP);
+-        if (grp == NULL) {
+-            ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
+-                          "getgrnam(\"" NGX_GROUP "\") failed");
+-            return NGX_CONF_ERROR;
+-        }
+ 
+-        ccf->group = grp->gr_gid;
++        ccf->group = NULL;
+     }
+ 
+