Mentioned the NGINX environment variable.
diff --git a/docs/man/nginx.8 b/docs/man/nginx.8
index bb37d9f..8fcb0b0 100644
--- a/docs/man/nginx.8
+++ b/docs/man/nginx.8
@@ -152,6 +152,12 @@
debug_connection 127.0.0.1;
}
.Ed
+.Sh ENVIRONMENT
+The
+.Ev NGINX
+environment variable is used internally by
+.Nm
+and should not be set directly by the user.
.Sh FILES
.Bl -tag -width indent
.It Pa %%PID_PATH%%
@@ -189,7 +195,7 @@
.An -nosplit
.An Igor Sysoev Aq igor@sysoev.ru .
.Pp
-This manual page was written by
+This manual page was originally written by
.An Sergey A. Osokin Aq osa@FreeBSD.org.ru
as a result of compiling many
.Nm
