[newlib-cygwin] Cygwin: add latest signal handling fixes to release notes

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=f0ea836b753b0756b00866ac8b909a0a7dfbac5f

commit f0ea836b753b0756b00866ac8b909a0a7dfbac5f
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Sat Apr 6 18:03:22 2019 +0200

    Cygwin: add latest signal handling fixes to release notes
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/release/3.0.6 | 9 +++++++--
 winsup/cygwin/release/3.1.0 | 3 +++
 winsup/doc/new-features.xml | 5 +++++
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/winsup/cygwin/release/3.0.6 b/winsup/cygwin/release/3.0.6
index 14a8329..d9fca58 100644
--- a/winsup/cygwin/release/3.0.6
+++ b/winsup/cygwin/release/3.0.6
@@ -9,6 +9,11 @@ What changed:
 Bug Fixes
 ---------
 
-- Fix the problem that `ps' or `pstree' may show up in their own
-  output twice.
+- Fix the problem that `ps' or `pstree' may show up in their own output twice.
   Addresses: Report on IRC
+
+- Honor setting uc_sigmask in a sigaction signal handler.
+  Addresses: https://cygwin.com/ml/cygwin/2019-04/msg00016.html
+
+- Fix signal handling if setcontext is called from a signal handler.
+  Addresses: Self-tested.
diff --git a/winsup/cygwin/release/3.1.0 b/winsup/cygwin/release/3.1.0
index d55b655..95569fc 100644
--- a/winsup/cygwin/release/3.1.0
+++ b/winsup/cygwin/release/3.1.0
@@ -13,6 +13,9 @@ What changed:
   Addresses: https://cygwin.com/ml/cygwin/2015-03/msg00047.html
              https://cygwin.com/ml/cygwin/2015-12/msg00311.html
 
+- If a SA_SIGINFO signal handler changes the ucontext_t pointed to by
+  the third parameter, follow it after returning from the handler.
+
 
 Bug Fixes
 ---------
diff --git a/winsup/doc/new-features.xml b/winsup/doc/new-features.xml
index 829f817..376789c 100644
--- a/winsup/doc/new-features.xml
+++ b/winsup/doc/new-features.xml
@@ -18,6 +18,11 @@ Add 24 bit color support using xterm compatibility mode in Windows 10
 uses the nearest color from 16 system colors.
 </para></listitem>
 
+<listitem><para>
+If a SA_SIGINFO signal handler changes the ucontext_t pointed to by the
+third parameter, follow it after returning from the handler.
+</para></listitem>
+
 </itemizedlist>
 
 </sect2>