Documentation of fips::enable doesn't seem to match what boringSSL does

[cjpatton]

The fips module in the boring crate has the following method:

 /// Moves the library into or out of the FIPS 140-2 mode of operation.                                                                                                                                                                                               
 ///
 /// This corresponds to `FIPS_mode_set`.
 pub fn enable(enabled: bool) -> Result<(), ErrorStack> {
     unsafe { cvt(ffi::FIPS_mode_set(enabled as _)).map(|_| ()) } op:                                                                                                                                                                                                 
 }   

However this is not what FIPS_mode_set promises to do. From include/openssl/crypto.h in build-sys/deps/boringssl-fips:

 // FIPS_mode_set returns one if |on| matches whether BoringSSL was built with                                                                                                                                                                                          
 // |BORINGSSL_FIPS| and zero otherwise.
 OPENSSL_EXPORT int FIPS_mode_set(int on);

Indeed, here is the implementation:

int FIPS_mode_set(int on) { return on == FIPS_mode(); }