Renamed ngx_handle_sent_chain() to ngx_chain_update_sent().

No functional changes.
diff --git a/src/os/unix/ngx_darwin_sendfile_chain.c b/src/os/unix/ngx_darwin_sendfile_chain.c
index 8485f97..d28f6e1 100644
--- a/src/os/unix/ngx_darwin_sendfile_chain.c
+++ b/src/os/unix/ngx_darwin_sendfile_chain.c
@@ -305,7 +305,7 @@
 
         c->sent += sent;
 
-        in = ngx_handle_sent_chain(in, sent);
+        in = ngx_chain_update_sent(in, sent);
 
         if (eintr) {
             send = prev_send + sent;
diff --git a/src/os/unix/ngx_freebsd_sendfile_chain.c b/src/os/unix/ngx_freebsd_sendfile_chain.c
index 88eacc2..666e0c5 100644
--- a/src/os/unix/ngx_freebsd_sendfile_chain.c
+++ b/src/os/unix/ngx_freebsd_sendfile_chain.c
@@ -356,7 +356,7 @@
 
         c->sent += sent;
 
-        in = ngx_handle_sent_chain(in, sent);
+        in = ngx_chain_update_sent(in, sent);
 
 #if (NGX_HAVE_AIO_SENDFILE)
         if (c->busy_sendfile) {
diff --git a/src/os/unix/ngx_linux_sendfile_chain.c b/src/os/unix/ngx_linux_sendfile_chain.c
index 60867c5..99d00bf 100644
--- a/src/os/unix/ngx_linux_sendfile_chain.c
+++ b/src/os/unix/ngx_linux_sendfile_chain.c
@@ -313,7 +313,7 @@
 
         c->sent += sent;
 
-        in = ngx_handle_sent_chain(in, sent);
+        in = ngx_chain_update_sent(in, sent);
 
         if (eintr) {
             send = prev_send;
diff --git a/src/os/unix/ngx_solaris_sendfilev_chain.c b/src/os/unix/ngx_solaris_sendfilev_chain.c
index 1b71f1d..e618379 100644
--- a/src/os/unix/ngx_solaris_sendfilev_chain.c
+++ b/src/os/unix/ngx_solaris_sendfilev_chain.c
@@ -197,7 +197,7 @@
 
         c->sent += sent;
 
-        in = ngx_handle_sent_chain(in, sent);
+        in = ngx_chain_update_sent(in, sent);
 
         if (eintr) {
             send = prev_send + sent;
diff --git a/src/os/unix/ngx_writev_chain.c b/src/os/unix/ngx_writev_chain.c
index c7b6ebf..2f5b175 100644
--- a/src/os/unix/ngx_writev_chain.c
+++ b/src/os/unix/ngx_writev_chain.c
@@ -131,7 +131,7 @@
 
         c->sent += sent;
 
-        in = ngx_handle_sent_chain(in, sent);
+        in = ngx_chain_update_sent(in, sent);
 
         if (eintr) {
             send = prev_send;