FreeBSD: chase CTL_UNSPEC to CTL_SYSCTL, IPPROTO_SEP to IPPROTO_DCCP renames

Plus, add new constants for sysctls that give names to existing magic numbers.

https://reviews.freebsd.org/rS350749
https://reviews.freebsd.org/rS352486

Author: valpackett

libc-test/build.rs

@@ -1810,6 +1810,22 @@ fn test_freebsd(target: &str) {
             // base system anyway.
             "CTL_MAXID" | "KERN_MAXID" | "HW_MAXID" | "USER_MAXID" => true,
 
+            // This was renamed in FreeBSD 12 and 13 (r352486).
+            "CTL_UNSPEC" | "CTL_SYSCTL" => true,
+
+            // These were added in FreeBSD 12 and 13 (r352486),
+            // but they are just names for magic numbers that existed for ages.
+            "CTL_SYSCTL_DEBUG"
+            | "CTL_SYSCTL_NAME"
+            | "CTL_SYSCTL_NEXT"
+            | "CTL_SYSCTL_NAME2OID"
+            | "CTL_SYSCTL_OIDFMT"
+            | "CTL_SYSCTL_OIDDESCR"
+            | "CTL_SYSCTL_OIDLABEL" => true,
+
+            // This was renamed in FreeBSD 12 and 13 (r350749).
+            "IPPROTO_SEP" | "IPPROTO_DCCP" => true,
+
             _ => false,
         }
     });

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -455,7 +455,13 @@ pub const CLOCK_SECOND: ::clockid_t = 13;
 pub const CLOCK_THREAD_CPUTIME_ID: ::clockid_t = 14;
 pub const CLOCK_PROCESS_CPUTIME_ID: ::clockid_t = 15;
 
+#[doc(hidden)]
+#[deprecated(
+    since = "0.2.72",
+    note = "CTL_UNSPEC is deprecated. Use CTL_SYSCTL instead"
+)]
 pub const CTL_UNSPEC: ::c_int = 0;
+pub const CTL_SYSCTL: ::c_int = 0;
 pub const CTL_KERN: ::c_int = 1;
 pub const CTL_VM: ::c_int = 2;
 pub const CTL_VFS: ::c_int = 3;
@@ -465,6 +471,13 @@ pub const CTL_HW: ::c_int = 6;
 pub const CTL_MACHDEP: ::c_int = 7;
 pub const CTL_USER: ::c_int = 8;
 pub const CTL_P1003_1B: ::c_int = 9;
+pub const CTL_SYSCTL_DEBUG: ::c_int = 0;
+pub const CTL_SYSCTL_NAME: ::c_int = 1;
+pub const CTL_SYSCTL_NEXT: ::c_int = 2;
+pub const CTL_SYSCTL_NAME2OID: ::c_int = 3;
+pub const CTL_SYSCTL_OIDFMT: ::c_int = 4;
+pub const CTL_SYSCTL_OIDDESCR: ::c_int = 5;
+pub const CTL_SYSCTL_OIDLABEL: ::c_int = 6;
 pub const KERN_OSTYPE: ::c_int = 1;
 pub const KERN_OSRELEASE: ::c_int = 2;
 pub const KERN_OSREV: ::c_int = 3;
@@ -782,8 +795,14 @@ pub const IPPROTO_BLT: ::c_int = 30;
 pub const IPPROTO_NSP: ::c_int = 31;
 /// Merit Internodal
 pub const IPPROTO_INP: ::c_int = 32;
-/// Sequential Exchange
+#[doc(hidden)]
+#[deprecated(
+    since = "0.2.72",
+    note = "IPPROTO_SEP is deprecated. Use IPPROTO_DCCP instead"
+)]
 pub const IPPROTO_SEP: ::c_int = 33;
+/// Datagram Congestion Control Protocol
+pub const IPPROTO_DCCP: ::c_int = 33;
 /// Third Party Connect
 pub const IPPROTO_3PC: ::c_int = 34;
 /// InterDomain Policy Routing