Move endpwent out of the base Unix module

* Doesn't do much without getpwent/setpwent
* Not supported on Android before Android O

Author: JayH5

src/unix/bsd/mod.rs

@@ -374,6 +374,7 @@ extern {
     #[cfg_attr(target_os = "netbsd", link_name = "__getpwent50")]
     pub fn getpwent() -> *mut passwd;
     pub fn setpwent();
+    pub fn endpwent();
     pub fn getprogname() -> *const ::c_char;
     pub fn setprogname(name: *const ::c_char);
     pub fn getloadavg(loadavg: *mut ::c_double, nelem: ::c_int) -> ::c_int;

src/unix/mod.rs

@@ -281,7 +281,6 @@ extern {
     pub fn getgrnam(name: *const ::c_char) -> *mut group;
     pub fn getgrgid(gid: ::gid_t) -> *mut group;
 
-    pub fn endpwent();
     #[cfg_attr(target_os = "netbsd", link_name = "__getpwnam50")]
     pub fn getpwnam(name: *const ::c_char) -> *mut passwd;
     #[cfg_attr(target_os = "netbsd", link_name = "__getpwuid50")]

src/unix/notbsd/linux/mod.rs

@@ -987,6 +987,7 @@ extern {
     pub fn lutimes(file: *const ::c_char, times: *const ::timeval) -> ::c_int;
 
     pub fn setpwent();
+    pub fn endpwent();
     pub fn getpwent() -> *mut passwd;
     pub fn setspent();
     pub fn endspent();

src/unix/solaris/mod.rs

@@ -1188,6 +1188,7 @@ extern {
                        sevlen: ::socklen_t,
                        flags: ::c_int) -> ::c_int;
     pub fn setpwent();
+    pub fn endpwent();
     pub fn getpwent() -> *mut passwd;
     pub fn fdatasync(fd: ::c_int) -> ::c_int;
     pub fn nl_langinfo_l(item: ::nl_item, locale: ::locale_t) -> *mut ::c_char;

src/unix/uclibc/mod.rs

@@ -1588,6 +1588,7 @@ extern {
     pub fn lutimes(file: *const ::c_char, times: *const ::timeval) -> ::c_int;
 
     pub fn setpwent();
+    pub fn endpwent();
     pub fn getpwent() -> *mut passwd;
     pub fn setspent();
     pub fn endspent();