https://bugs.gentoo.org/888063
https://github.com/Icinga/icinga2/issues/9618
https://github.com/Icinga/icinga2/pull/9624

From 5bcbc96e221bb3aafc370449941bfbd70939915c Mon Sep 17 00:00:00 2001
From: "Alexander A. Klimov" <alexander.klimov@icinga.com>
Date: Wed, 4 Jan 2023 17:02:19 +0100
Subject: [PATCH 1/2] Handle boost::beast::http::basic_fields#set() signature
 change (v1.81)

Make String convertible to boost::beast::string_view (always working),
not boost::string_view (broken).
--- a/lib/base/string.cpp
+++ b/lib/base/string.cpp
@@ -128,15 +128,15 @@ String::operator const std::string&() const
 }
 
 /**
- * Conversion function to boost::string_view.
+ * Conversion function to boost::beast::string_view.
  *
  * This allows using String as the value for HTTP headers in boost::beast::http::basic_fields::set.
  *
- * @return A boost::string_view representing this string.
+ * @return A boost::beast::string_view representing this string.
  */
-String::operator boost::string_view() const
+String::operator boost::beast::string_view() const
 {
-	return boost::string_view(m_Data);
+	return boost::beast::string_view(m_Data);
 }
 
 const char *String::CStr() const
--- a/lib/base/string.hpp
+++ b/lib/base/string.hpp
@@ -5,6 +5,7 @@
 
 #include "base/i2-base.hpp"
 #include "base/object.hpp"
+#include <boost/beast/core.hpp>
 #include <boost/range/iterator.hpp>
 #include <boost/utility/string_view.hpp>
 #include <functional>
@@ -73,7 +74,7 @@ class String
 	bool operator<(const String& rhs) const;
 
 	operator const std::string&() const;
-	operator boost::string_view() const;
+	operator boost::beast::string_view() const;
 
 	const char *CStr() const;
 

From 99c2d69dc85dfcd044e4a83d4894aa52eedfe09d Mon Sep 17 00:00:00 2001
From: "Alexander A. Klimov" <alexander.klimov@icinga.com>
Date: Wed, 4 Jan 2023 17:34:49 +0100
Subject: [PATCH 2/2] Handle boost::beast::http::basic_fields#operator[]()
 signature change (v1.81)

Use always working std::string(x), not broken x.to_string().
(x is a return value.)
--- a/lib/remote/httphandler.cpp
+++ b/lib/remote/httphandler.cpp
@@ -58,7 +58,7 @@ void HttpHandler::ProcessRequest(
 	Dictionary::Ptr node = m_UrlTree;
 	std::vector<HttpHandler::Ptr> handlers;
 
-	Url::Ptr url = new Url(request.target().to_string());
+	Url::Ptr url = new Url(std::string(request.target()));
 	auto& path (url->GetPath());
 
 	for (std::vector<String>::size_type i = 0; i <= path.size(); i++) {
--- a/lib/remote/httpserverconnection.cpp
+++ b/lib/remote/httpserverconnection.cpp
@@ -246,7 +246,7 @@ bool HandleAccessControl(
 			if (!allowedOrigins.empty()) {
 				auto& origin (request[http::field::origin]);
 
-				if (allowedOrigins.find(origin.to_string()) != allowedOrigins.end()) {
+				if (allowedOrigins.find(std::string(origin)) != allowedOrigins.end()) {
 					response.set(http::field::access_control_allow_origin, origin);
 				}
 
@@ -536,7 +536,7 @@ void HttpServerConnection::ProcessMessages(boost::asio::yield_context yc)
 			if (!authenticatedUser) {
 				CpuBoundWork fetchingAuthenticatedUser (yc);
 
-				authenticatedUser = ApiUser::GetByAuthHeader(request[http::field::authorization].to_string());
+				authenticatedUser = ApiUser::GetByAuthHeader(std::string(request[http::field::authorization]));
 			}
 
 			Log logMsg (LogInformation, "HttpServerConnection");