try! -> ?

Automated conversion using the untry tool [1] and the following command:

```
$ find -name '*.rs' -type f | xargs untry
```

at the root of the Rust repo.

[1]: https://github.com/japaric/untry

1 files changed, 8 insertions, 8 deletions

diff --git a/src/libstd/sys/unix/net.rs b/src/libstd/sys/unix/net.rs
index d7b353c9b2a..830957a7e59 100644
--- a/src/libstd/sys/unix/net.rs
+++ b/src/libstd/sys/unix/net.rs
@@ -75,7 +75,7 @@ impl Socket {
                 }
             }
 
-            let fd = try!(cvt(libc::socket(fam, ty, 0)));
+            let fd = cvt(libc::socket(fam, ty, 0))?;
             let fd = FileDesc::new(fd);
             fd.set_cloexec();
             Ok(Socket(fd))
@@ -97,7 +97,7 @@ impl Socket {
                 }
             }
 
-            try!(cvt(libc::socketpair(fam, ty, 0, fds.as_mut_ptr())));
+            cvt(libc::socketpair(fam, ty, 0, fds.as_mut_ptr()))?;
             let a = FileDesc::new(fds[0]);
             a.set_cloexec();
             let b = FileDesc::new(fds[1]);
@@ -128,9 +128,9 @@ impl Socket {
             }
         }
 
-        let fd = try!(cvt_r(|| unsafe {
+        let fd = cvt_r(|| unsafe {
             libc::accept(self.0.raw(), storage, len)
-        }));
+        })?;
         let fd = FileDesc::new(fd);
         fd.set_cloexec();
         Ok(Socket(fd))
@@ -185,7 +185,7 @@ impl Socket {
     }
 
     pub fn timeout(&self, kind: libc::c_int) -> io::Result<Option<Duration>> {
-        let raw: libc::timeval = try!(getsockopt(self, libc::SOL_SOCKET, kind));
+        let raw: libc::timeval = getsockopt(self, libc::SOL_SOCKET, kind)?;
         if raw.tv_sec == 0 && raw.tv_usec == 0 {
             Ok(None)
         } else {
@@ -201,7 +201,7 @@ impl Socket {
             Shutdown::Read => libc::SHUT_RD,
             Shutdown::Both => libc::SHUT_RDWR,
         };
-        try!(cvt(unsafe { libc::shutdown(self.0.raw(), how) }));
+        cvt(unsafe { libc::shutdown(self.0.raw(), how) })?;
         Ok(())
     }
 
@@ -210,7 +210,7 @@ impl Socket {
     }
 
     pub fn nodelay(&self) -> io::Result<bool> {
-        let raw: c_int = try!(getsockopt(self, libc::IPPROTO_TCP, libc::TCP_NODELAY));
+        let raw: c_int = getsockopt(self, libc::IPPROTO_TCP, libc::TCP_NODELAY)?;
         Ok(raw != 0)
     }
 
@@ -220,7 +220,7 @@ impl Socket {
     }
 
     pub fn take_error(&self) -> io::Result<Option<io::Error>> {
-        let raw: c_int = try!(getsockopt(self, libc::SOL_SOCKET, libc::SO_ERROR));
+        let raw: c_int = getsockopt(self, libc::SOL_SOCKET, libc::SO_ERROR)?;
         if raw == 0 {
             Ok(None)
         } else {