fix typo

src/http/modules/ngx_http_fastcgi_module.c

diff --git a/src/http/modules/ngx_http_fastcgi_module.c b/src/http/modules/ngx_http_fastcgi_module.c
index d7aa9b2..710b98d 100644
--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c
@@ -242,7 +242,7 @@
 
     { ngx_string("fastcgi_bind"),
       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
-      ngx_http_upsteam_bind_set_slot,
+      ngx_http_upstream_bind_set_slot,
       NGX_HTTP_LOC_CONF_OFFSET,
       offsetof(ngx_http_fastcgi_loc_conf_t, upstream.local),
       NULL },

src/http/modules/ngx_http_memcached_module.c

diff --git a/src/http/modules/ngx_http_memcached_module.c b/src/http/modules/ngx_http_memcached_module.c
index 9205215..2dae38a 100644
--- a/src/http/modules/ngx_http_memcached_module.c
+++ b/src/http/modules/ngx_http_memcached_module.c
@@ -65,7 +65,7 @@
 
     { ngx_string("memcached_bind"),
       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
-      ngx_http_upsteam_bind_set_slot,
+      ngx_http_upstream_bind_set_slot,
       NGX_HTTP_LOC_CONF_OFFSET,
       offsetof(ngx_http_memcached_loc_conf_t, upstream.local),
       NULL },

src/http/modules/ngx_http_proxy_module.c

diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index 1fdc279..a7f6e49 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -231,7 +231,7 @@
 
     { ngx_string("proxy_bind"),
       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
-      ngx_http_upsteam_bind_set_slot,
+      ngx_http_upstream_bind_set_slot,
       NGX_HTTP_LOC_CONF_OFFSET,
       offsetof(ngx_http_proxy_loc_conf_t, upstream.local),
       NULL },

src/http/ngx_http_upstream.c

diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index 9f1a897..35bd35f 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -4204,7 +4204,7 @@
 
 
 char *
-ngx_http_upsteam_bind_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
+ngx_http_upstream_bind_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
     void *conf)
 {
     char  *p = conf;

src/http/ngx_http_upstream.h

diff --git a/src/http/ngx_http_upstream.h b/src/http/ngx_http_upstream.h
index 09fab00..2534112 100644
--- a/src/http/ngx_http_upstream.h
+++ b/src/http/ngx_http_upstream.h
@@ -323,7 +323,7 @@
 void ngx_http_upstream_init(ngx_http_request_t *r);
 ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf,
     ngx_url_t *u, ngx_uint_t flags);
-char *ngx_http_upsteam_bind_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
+char *ngx_http_upstream_bind_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
     void *conf);
 ngx_int_t ngx_http_upstream_hide_headers_hash(ngx_conf_t *cf,
     ngx_http_upstream_conf_t *conf, ngx_http_upstream_conf_t *prev,