Errors.h: Add ESOCKTNOSUPPORT.

It's in POSIX.1-2024, see
https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/errno.h.html

Fixes #19347.

headers/build/os/support/Errors.h

@@ -185,6 +185,7 @@
 #define HAIKU_ENOATTR		B_TO_POSIX_ERROR(B_POSIX_ERROR_BASE + 60)
 #define HAIKU_ENOTRECOVERABLE	B_TO_POSIX_ERROR(B_POSIX_ERROR_BASE + 61)
 #define HAIKU_EOWNERDEAD	B_TO_POSIX_ERROR(B_POSIX_ERROR_BASE + 62)
+#define HAIKU_ESOCKTNOSUPPORT	B_TO_POSIX_ERROR(B_POSIX_ERROR_BASE + 63)
 
 /* B_NO_MEMORY (0x80000000) can't be negated, so it needs special handling */
 #define HAIKU_ENOMEM		B_NO_MEMORY

headers/os/support/Errors.h

@@ -189,6 +189,7 @@
 #define ENOATTR			B_TO_POSIX_ERROR(B_POSIX_ERROR_BASE + 60)
 #define ENOTRECOVERABLE	B_TO_POSIX_ERROR(B_POSIX_ERROR_BASE + 61)
 #define EOWNERDEAD		B_TO_POSIX_ERROR(B_POSIX_ERROR_BASE + 62)
+#define ESOCKTNOSUPPORT	B_TO_POSIX_ERROR(B_POSIX_ERROR_BASE + 63)
 
 /* B_NO_MEMORY (0x80000000) can't be negated, so it needs special handling */
 #ifdef B_USE_POSITIVE_POSIX_ERRORS

src/bin/error.c

@@ -295,6 +295,9 @@ struct error_pair {
 #endif
 #ifdef EOWNERDEAD
 	E(EOWNERDEAD),
+#endif
+#ifdef ESOCKTNOSUPPORT
+	E(ESOCKTNOSUPPORT),
 #endif
 	E(EWOULDBLOCK),
 	E(EXDEV),

src/system/libroot/posix/string/strerror.c

@@ -536,6 +536,8 @@ error_description(int error)
 			return "State not recoverable";
 		case EOWNERDEAD:
 			return "Previous owner died";
+		case ESOCKTNOSUPPORT:
+			return "Socket type not supported";
 
 		default:
 			return NULL;