Error compiling for linux-musl

[posk-io]

cargo build --release --target=x86_64-unknown-linux-musl produces

   Compiling alioth v0.12.0
error: cannot construct `msghdr` with struct literal syntax due to private fields
  --> [...].cargo/registry/src/index.crates.io-1949cf8c6b5b557f/alioth-0.12.0/src/utils/uds.rs:34:23
   |
34 |     let mut uds_msg = libc::msghdr {
   |                       ^^^^^^^^^^^^
   |
   = note: ...and other private fields `__pad1` and `__pad2` that were not provided

error: cannot construct `msghdr` with struct literal syntax due to private fields
   --> [...].cargo/registry/src/index.crates.io-1949cf8c6b5b557f/alioth-0.12.0/src/utils/uds.rs:110:19
    |
110 |     let uds_msg = libc::msghdr {
    |                   ^^^^^^^^^^^^
    |
    = note: ...and other private fields `__pad1` and `__pad2` that were not provided

error[E0063]: missing field `__pad1` in initializer of `cmsghdr`
   --> [...].cargo/registry/src/index.crates.io-1949cf8c6b5b557f/alioth-0.12.0/src/utils/uds.rs:120:20
    |
120 |         let cmsg = libc::cmsghdr {
    |                    ^^^^^^^^^^^^^ missing `__pad1`

For more information about this error, try `rustc --explain E0063`.
error: could not compile `alioth` (lib) due to 3 previous errors

[Lencerf]

Fixed in #455