change proto for getnameinfo()

arguments `hostlen' and `servlen' are `socklen_t' or `size_t' depending
the platform

- apple: I don't known, so I don't change the original definition (socklen_t)
- netbsd: socklen_t
- freebsd: size_t
- dragonfly: size_t
- openbsd: size_t
- bitrig: size_t

src/unix/bsd/apple/mod.rs

@@ -810,6 +810,13 @@ pub const IUTF8: ::tcflag_t = 0x00004000;
 pub const CRTSCTS: ::tcflag_t = 0x00030000;
 
 extern {
+    pub fn getnameinfo(sa: *const ::sockaddr,
+                       salen: ::socklen_t,
+                       host: *mut ::c_char,
+                       hostlen: ::socklen_t,
+                       serv: *mut ::c_char,
+                       sevlen: ::socklen_t,
+                       flags: ::c_int) -> ::c_int;
     pub fn mincore(addr: *const ::c_void, len: ::size_t,
                    vec: *mut ::c_char) -> ::c_int;
     pub fn sysctlnametomib(name: *const ::c_char,

src/unix/bsd/freebsdlike/mod.rs

@@ -558,6 +558,13 @@ pub const ST_NOSUID: ::c_ulong = 2;
 pub const HW_AVAILCPU: ::c_int = 25;
 
 extern {
+    pub fn getnameinfo(sa: *const ::sockaddr,
+                       salen: ::socklen_t,
+                       host: *mut ::c_char,
+                       hostlen: ::size_t,
+                       serv: *mut ::c_char,
+                       servlen: ::size_t,
+                       flags: ::c_int) -> ::c_int;
     pub fn mincore(addr: *const ::c_void, len: ::size_t,
                    vec: *mut ::c_char) -> ::c_int;
     pub fn sysctlnametomib(name: *const ::c_char,

src/unix/bsd/mod.rs

@@ -322,13 +322,6 @@ extern {
     pub fn setgroups(ngroups: ::c_int,
                      ptr: *const ::gid_t) -> ::c_int;
     pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
-    pub fn getnameinfo(sa: *const ::sockaddr,
-                       salen: ::socklen_t,
-                       host: *mut ::c_char,
-                       hostlen: ::socklen_t,
-                       serv: *mut ::c_char,
-                       sevlen: ::socklen_t,
-                       flags: ::c_int) -> ::c_int;
     pub fn kqueue() -> ::c_int;
     pub fn unmount(target: *const ::c_char, arg: ::c_int) -> ::c_int;
     pub fn syscall(num: ::c_int, ...) -> ::c_int;

src/unix/bsd/openbsdlike/bitrig.rs

@@ -216,6 +216,13 @@ pub const HW_AVAILCPU: ::c_int = 25;
 pub const KERN_PROC_ARGS: ::c_int = 55;
 
 extern {
+    pub fn getnameinfo(sa: *const ::sockaddr,
+                       salen: ::socklen_t,
+                       host: *mut ::c_char,
+                       hostlen: ::size_t,
+                       serv: *mut ::c_char,
+                       servlen: ::size_t,
+                       flags: ::c_int) -> ::c_int;
     pub fn mprotect(addr: *const ::c_void, len: ::size_t, prot: ::c_int)
                     -> ::c_int;
     pub fn sysctl(name: *mut ::c_int,

src/unix/bsd/openbsdlike/netbsd.rs

@@ -321,6 +321,13 @@ pub const NOTE_PCTRLMASK: ::uint32_t = 0xf0000000;
 pub const CRTSCTS: ::tcflag_t = 0x00010000;
 
 extern {
+    pub fn getnameinfo(sa: *const ::sockaddr,
+                       salen: ::socklen_t,
+                       host: *mut ::c_char,
+                       hostlen: ::socklen_t,
+                       serv: *mut ::c_char,
+                       sevlen: ::socklen_t,
+                       flags: ::c_int) -> ::c_int;
     pub fn mprotect(addr: *mut ::c_void, len: ::size_t, prot: ::c_int)
                     -> ::c_int;
     pub fn sysctl(name: *const ::c_int,

src/unix/bsd/openbsdlike/openbsd.rs

@@ -218,6 +218,13 @@ pub const KERN_PROC_ARGS: ::c_int = 55;
 pub const SYS_getentropy: ::c_int = 7;
 
 extern {
+    pub fn getnameinfo(sa: *const ::sockaddr,
+                       salen: ::socklen_t,
+                       host: *mut ::c_char,
+                       hostlen: ::size_t,
+                       serv: *mut ::c_char,
+                       servlen: ::size_t,
+                       flags: ::c_int) -> ::c_int;
     pub fn mprotect(addr: *mut ::c_void, len: ::size_t, prot: ::c_int)
                     -> ::c_int;
     pub fn sysctl(name: *const ::c_int,