Ready for 2.54

Changes

@@ -8,6 +8,7 @@ Contributors
 The following people contributed notes, ideas, or patches that have
 been incorporated in changes in this release:
 
+Emmanuel Mogenet <emogenet@google.com>
 Michael Berg <michaeljberg@gmail.com>
 
 Apologies if I missed anyone!
@@ -49,6 +50,7 @@ man1/README
     mtk
         Already deleted most of the man1 pages previously, so
         this doesn't need to stay.
+
 LDP.7
     mtk
         Removed this page since it is out of date, and the proper place 
@@ -89,6 +91,18 @@ fdatasync.2
 	equivalent to fsync() on Linux 2.2 into a NOTES note 
 	about this historical behaviour.
 
+futex.2
+    mtk
+        Small rewording to fix "fails with the error EWOULDBLOCK" 
+	rather than "returns EWOULDBLOCK".
+	See Red Hat bug 172828.
+
+mprotect.2
+    mtk, after an observation by Emmanuel Mogenet
+        A much improved example program.
+    mtk
+        Significant rewrites and additions to description.
+
 mremap.2
     mtk
         Remove text about the non-existent BSD mremap() -- too
@@ -106,6 +120,10 @@ set_tid_address.2
     mtk
         Small rewording in RETURN VALUE section.
 
+sigaction.2
+    mtk
+       Add EXAMPLE section with a pointer to example in mprotect.2.
+
 sync_file_range.2
     mtk
         Fix return type in SYNOPSIS.  Add RETURN VALUE section.
@@ -133,6 +151,11 @@ fputwc.3
     mtk
         Added 'putwc' to .SH NAME list.
 
+gethostbyname.3
+    mtk
+        s/int/socklen_t/ for type of gethostbyaddr() 'len' argument,
+	and add a few more words in NOTES about the type used here.
+
 login.3
     mtk
         Removed remark from NOTES about linking with -lutil; add