Merge #18405: build: Drop all of the ZeroMQ patches

f642b49af7 build: Drop ZeroMQ patch for glibc < 2.12 (Hennadii Stepanov)
079df9609e build: Drop ZeroMQ patch for Mingw-w64 < 4.0 (Hennadii Stepanov)

Pull request description:

  This PR gets rid of the all patches for ZeroMQ:
  - the [Mingw-w64 5.0 (Ubuntu 18.04 bionic)](https://packages.ubuntu.com/bionic/mingw-w64) is used to build the [Windows](https://github.com/bitcoin/bitcoin/blob/master/doc/build-windows.md) binaries
  - it is safe to use `pthread_setname_np` since #17538 when the minimal `glibc` version is set to 2.17; see: https://github.com/bitcoin/bitcoin/pull/11986#issuecomment-366105050

ACKs for top commit:
  fanquake:
    ACK f642b49af7.

Tree-SHA512: a2c97cdb682cd7d96a666ad099f20725a32bf8fda0842fc5534ca08a1634c90ba80afde92f9054595ed2501fbc5c02abbe3da765934ecff12d836ff25e277fc5

depends/patches/zeromq/0001-fix-build-with-older-mingw64.patch

@@ -1,30 +0,0 @@
-From f6866b0f166ad168618aae64c7fbee8775d3eb23 Mon Sep 17 00:00:00 2001
-From: mruddy <6440430+mruddy@users.noreply.github.com>
-Date: Sat, 30 Jun 2018 09:44:58 -0400
-Subject: [PATCH] fix build with older mingw64
-
----
- src/windows.hpp | 7 +++++++
- 1 file changed, 7 insertions(+)
-
-diff --git a/src/windows.hpp b/src/windows.hpp
-index 6c3839fd..2c32ec79 100644
---- a/src/windows.hpp
-+++ b/src/windows.hpp
-@@ -58,6 +58,13 @@
- #include <winsock2.h>
- #include <windows.h>
- #include <mswsock.h>
-+
-+#if defined __MINGW64_VERSION_MAJOR && __MINGW64_VERSION_MAJOR < 4
-+// Workaround for mingw-w64 < v4.0 which did not include ws2ipdef.h in iphlpapi.h.
-+// Fixed in mingw-w64 by 9bd8fe9148924840d315b4c915dd099955ea89d1.
-+#include <ws2def.h>
-+#include <ws2ipdef.h>
-+#endif
- #include <iphlpapi.h>
- 
- #if !defined __MINGW32__
--- 
-2.17.1
-

depends/patches/zeromq/0002-disable-pthread_set_name_np.patch

@@ -1,35 +0,0 @@
-From c9bbdd6581d07acfe8971e4bcebe278a3676cf03 Mon Sep 17 00:00:00 2001
-From: mruddy <6440430+mruddy@users.noreply.github.com>
-Date: Sat, 30 Jun 2018 09:57:18 -0400
-Subject: [PATCH] disable pthread_set_name_np
-
-pthread_set_name_np adds a Glibc requirement on >= 2.12.
----
- src/thread.cpp | 4 +++-
- 1 file changed, 3 insertions(+), 1 deletion(-)
-
-diff --git a/src/thread.cpp b/src/thread.cpp
-index a1086b0c..9943f354 100644
---- a/src/thread.cpp
-+++ b/src/thread.cpp
-@@ -308,7 +308,7 @@ void zmq::thread_t::setThreadName (const char *name_)
-  */
-     if (!name_)
-         return;
--
-+#if 0
- #if defined(ZMQ_HAVE_PTHREAD_SETNAME_1)
-     int rc = pthread_setname_np (name_);
-     if (rc)
-@@ -324,6 +324,8 @@ void zmq::thread_t::setThreadName (const char *name_)
- #elif defined(ZMQ_HAVE_PTHREAD_SET_NAME)
-     pthread_set_name_np (_descriptor, name_);
- #endif
-+#endif
-+    return;
- }
- 
- #endif
--- 
-2.17.1
-