Squashed 'Sources/OpenVPNAdapter/Libraries/Vendors/openvpn/' changes from 554d8b888..cc90cde57

cc90cde57 win: use 'MSVC 2017 Professional' as default compiler
4b072bce1 [OVPN3-311] function.hpp: fix Windows build
48b9b78de [OVPN3-310] logging: fix 'OPENVPN_LOG_NTNL': identifier not found
5a4a87552 cosmetics: helper function to check registry errors
fc52fd8a5 [OC-78] proxy: support PROXY_AUTO_CONFIG_URL on Windows
f5178cff9 [OC-77] proxy: refactor proxy settings code
18e50ec3f ReplyParser: added undefined status
8178ae06f unix file utils: added update_file_mod_time_nanoseconds()
8f20f7693 build: use LZ4_SYS=1 default when target is Linux
4bd996e61 timestr: added date_time_utc() and nanosec_time_to_string()
0eaa2586f string: added remove_spaces() method
d47ae03cc OptionList: added get_c_str() method
1eb9cd657 unix file utils: added mtime_ns parameter to write_binary_unix() and write_binary_atomic()
bf00c6e3e Time::delta_str(): use "INF" to denote infinite time
0e598a87b kovpn.hpp: asio must be included before sys/ and linux/ headers to avoid redefinition conflicts
1d2ce460d BufferType: added read_alloc_buf() method
148ae6085 BufferType: added reset_offset() method
6218ed618 Factor out IP::random_addr_v4() and IP::random_addr_v6() from IP::random_addr().
5468670b9 pool: minor changes
36a885a82 route: allow for specialized IPv4/v6 RouteType
5e29e6628 BufferType: added typedef T value_type
d92021c99 strerror.hpp: added #include <errno.h> for benefit of users
363cbece3 Function: misc cleanup
d88435ecd IP::Route: added defined() method
3371cb745 kovpn.hpp: fix centos build with DCO enabled
dc9e48d98 Fix bug in macos tunnel interface setup. Second ip address should be gateway address
bcdb27993 Merged in schwabe/fix_clang_warnings (pull request #25)
ede5e90ff Merged in schabe/fix_swig_ipadr (pull request #27)
c0d580d24 Merged in schwabe/fix_openvpn_extern (pull request #26)
0965882e5 Merged in schwabe/stats_morecpus (pull request #23)
5f1f8470b Revert bugfix for not compiling IA32 ASM of 2.7.5
bde2c41be dep: switch from mbeTLS 2.7.0 to 2.7.5
9d06b5c97 [OC-77] proxy: support PROXY_AUTO_CONFIG_URL on macOS
3f2ad8e8c Hide const std::string IP methods from SWIG
ba264862a Send also kovpn statistics of CPU Cores >= 16 via status message
2991d38b3 Fix warnings reported by LLVM/Clang
02d2a7975 Fix multiple inclusion of OpenVPN3 header with OPENPVN_EXTERN

git-subtree-dir: Sources/OpenVPNAdapter/Libraries/Vendors/openvpn
git-subtree-split: cc90cde5769dcf9e13fdd9e85d6d0857963dabce

openvpn/addr/ip.hpp

@@ -78,10 +78,16 @@ namespace openvpn {
       {
       }
 
+#ifndef SWIGPYTHON
+      // When calling IP:Addr with None as the second parameter, Swig will
+      // always pick this function and complain about not being able to convert
+      // a null pointer to a const std::string reference. Hide this function, so
+      // swig is forced to take the const char* variant of this function instead
       Addr(const std::string& ipstr, const std::string& title, Version required_version = UNSPEC)
 	: Addr(from_string(ipstr, title.c_str(), required_version))
       {
       }
+#endif
 
       void validate_version(const char *title, Version required_version) const
       {
@@ -89,10 +95,12 @@ namespace openvpn {
 	  throw ip_exception(internal::format_error(to_string(), title, version_string_static(required_version), "wrong IP version"));
       }
 
+#ifndef SWIGPYTHON
       void validate_version(const std::string& title, Version required_version) const
       {
 	validate_version(title.c_str(), required_version);
       }
+#endif
 
       static std::string validate(const std::string& ipstr, const char *title = nullptr, Version required_version = UNSPEC)
       {
@@ -100,10 +108,12 @@ namespace openvpn {
 	return a.to_string();
       }
 
+#ifndef SWIGPYTHON
       static std::string validate(const std::string& ipstr, const std::string& title, Version required_version = UNSPEC)
       {
 	return validate(ipstr, title.c_str(), required_version);
       }
+#endif
 
       static bool is_valid(const std::string& ipstr)
       {