Merge bitcoin/bitcoin#30868: refactor: add clang-tidy modernize-use-starts-ends-with check

fc7b507e9a tidy: add clang-tidy `modernize-use-starts-ends-with` check (Roman Zeyde)

Pull request description:

ACKs for top commit:
  jonatack:
    re-ACK fc7b507e9a only change since my previous ACK is the commit message
  achow101:
    ACK fc7b507e9a
  stickies-v:
    ACK fc7b507e9a
  hebasto:
    ACK fc7b507e9a, I have reviewed the code and it looks OK.

Tree-SHA512: 334e0ff91b9b108a57cdfc12ee53685b792d377e11124c7c394b8f681a8168a8d65a56c7f884555238e65e97e9ad62ede52b79219ce258979e54abdd76721df1

src/.clang-tidy

@@ -14,6 +14,7 @@ modernize-use-emplace,
 modernize-use-equals-default,
 modernize-use-noexcept,
 modernize-use-nullptr,
+modernize-use-starts-ends-with,
 performance-*,
 -performance-avoid-endl,
 -performance-enum-size,

src/httpserver.cpp

@@ -315,7 +315,7 @@ static void http_request_cb(struct evhttp_request* req, void* arg)
         if (i->exactMatch)
             match = (strURI == i->prefix);
         else
-            match = (strURI.substr(0, i->prefix.size()) == i->prefix);
+            match = strURI.starts_with(i->prefix);
         if (match) {
             path = strURI.substr(i->prefix.size());
             break;

src/init.cpp

@@ -1356,7 +1356,7 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
             if (!SplitHostPort(socket_addr, port_out, host_out)) {
 #ifdef HAVE_SOCKADDR_UN
                 // Allow unix domain sockets for some options e.g. unix:/some/file/path
-                if (!unix || socket_addr.find(ADDR_PREFIX_UNIX) != 0) {
+                if (!unix || !socket_addr.starts_with(ADDR_PREFIX_UNIX)) {
                     return InitError(InvalidPortErrMsg(arg, socket_addr));
                 }
 #else

src/netbase.cpp

@@ -230,7 +230,7 @@ CService LookupNumeric(const std::string& name, uint16_t portDefault, DNSLookupF
 bool IsUnixSocketPath(const std::string& name)
 {
 #ifdef HAVE_SOCKADDR_UN
-    if (name.find(ADDR_PREFIX_UNIX) != 0) return false;
+    if (!name.starts_with(ADDR_PREFIX_UNIX)) return false;
 
     // Split off "unix:" prefix
     std::string str{name.substr(ADDR_PREFIX_UNIX.length())};