Commits on Mar 23, 2022

1. Make uname always safe …

   This fixes several issues with the current `uname` bindings:
   
     - Do not ignore `uname` errors; at least on glibc `uname` can fail,
       so now it returns a `Result` instead of assuming that the call
       will always succeed.
   
     - Do not assume `uname` will initialize every member of `utsname`;
       not every implementation initializes every field, so internally
       the struct is now zero-initialized.
   
     - Do not blindly assume strings returned by `uname` will always be valid UTF-8;
       `UtsName`'s accessors will now return `&OsStr`s instead of `&str`s.

   

   koute committed Mar 23, 2022
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