References to `CString::from_vec` changed to `new`
References to `CString::from_vec` changed to `new`

It looks like `from_vec` was subsumed by new at some point,
but the documentation still refers to it as `from_vec`.

This updates the documentation for `from_vec_unchecked`
so that it properly says that it's the unchecked version of `new`.

Also, from_vec_unchecked requires a actual Vec<u8> while
new can take anything that is Into<Vec<u8>>, so I also
mention that in the documentation.

l0kod/rust,cllns/rust,zubron/rust,zubron/rust,pshc/rust,carols10cents/rust,vhbit/rust,nwin/rust,zachwick/rust,dwillmer/rust,mvdnes/rust,GBGamer/rust,kwantam/rust,zachwick/rust,andars/rust,jashank/rust,pelmers/rust,aepsil0n/rust,omasanori/rust,l0kod/rust,jashank/rust,omasanori/rust,graydon/rust,mdinger/rust,l0kod/rust,pshc/rust,aepsil0n/rust,aneeshusa/rust,philyoon/rust,sae-bom/rust,aneeshusa/rust,seanrivera/rust,cllns/rust,graydon/rust,vhbit/rust,robertg/rust,gifnksm/rust,carols10cents/rust,philyoon/rust,aneeshusa/rust,mvdnes/rust,jashank/rust,reem/rust,graydon/rust,mdinger/rust,andars/rust,zachwick/rust,jashank/rust,XMPPwocky/rust,pelmers/rust,pelmers/rust,sae-bom/rust,krzysz00/rust,aidancully/rust,carols10cents/rust,mvdnes/rust,zachwick/rust,graydon/rust,mihneadb/rust,andars/rust,pshc/rust,seanrivera/rust,zubron/rust,gifnksm/rust,aneeshusa/rust,omasanori/rust,zachwick/rust,graydon/rust,zubron/rust,philyoon/rust,philyoon/rust,andars/rust,TheNeikos/rust,mdinger/rust,jashank/rust,andars/rust,zubron/rust,cllns/rust,l0kod/rust,cllns/rust,jroesch/rust,nwin/rust,KokaKiwi/rust,mdinger/rust,cllns/rust,mdinger/rust,victorvde/rust,l0kod/rust,aidancully/rust,XMPPwocky/rust,XMPPwocky/rust,seanrivera/rust,rohitjoshi/rust,zubron/rust,ejjeong/rust,vhbit/rust,zubron/rust,mihneadb/rust,reem/rust,jroesch/rust,dwillmer/rust,nwin/rust,jashank/rust,nwin/rust,graydon/rust,omasanori/rust,ejjeong/rust,jashank/rust,l0kod/rust,mihneadb/rust,aidancully/rust,carols10cents/rust,KokaKiwi/rust,KokaKiwi/rust,aneeshusa/rust,rohitjoshi/rust,dwillmer/rust,pshc/rust,nwin/rust,rohitjoshi/rust,jroesch/rust,jroesch/rust,dwillmer/rust,mihneadb/rust,mihneadb/rust,XMPPwocky/rust,pelmers/rust,GBGamer/rust,andars/rust,gifnksm/rust,philyoon/rust,robertg/rust,vhbit/rust,aepsil0n/rust,l0kod/rust,TheNeikos/rust,victorvde/rust,jroesch/rust,aepsil0n/rust,kwantam/rust,vhbit/rust,zachwick/rust,GBGamer/rust,cllns/rust,robertg/rust,KokaKiwi/rust,krzysz00/rust,omasanori/rust,TheNeikos/rust,reem/rust,sae-bom/rust,pelmers/rust,vhbit/rust,kwantam/rust,krzysz00/rust,mihneadb/rust,dwillmer/rust,carols10cents/rust,GBGamer/rust,robertg/rust,KokaKiwi/rust,GBGamer/rust,mvdnes/rust,sae-bom/rust,XMPPwocky/rust,gifnksm/rust,pshc/rust,victorvde/rust,mvdnes/rust,reem/rust,pshc/rust,jroesch/rust,nwin/rust,zubron/rust,philyoon/rust,sae-bom/rust,GBGamer/rust,victorvde/rust,l0kod/rust,krzysz00/rust,nwin/rust,mdinger/rust,victorvde/rust,reem/rust,nwin/rust,ejjeong/rust,rohitjoshi/rust,robertg/rust,aidancully/rust,kwantam/rust,rohitjoshi/rust,gifnksm/rust,dwillmer/rust,kwantam/rust,aidancully/rust,krzysz00/rust,XMPPwocky/rust,dwillmer/rust,krzysz00/rust,robertg/rust,victorvde/rust,carols10cents/rust,pshc/rust,GBGamer/rust,pshc/rust,GBGamer/rust,vhbit/rust,TheNeikos/rust,KokaKiwi/rust,mvdnes/rust,aepsil0n/rust,rohitjoshi/rust,jroesch/rust,TheNeikos/rust,ejjeong/rust,reem/rust,aepsil0n/rust,ejjeong/rust,pelmers/rust,gifnksm/rust,dwillmer/rust,TheNeikos/rust,seanrivera/rust,kwantam/rust,omasanori/rust,seanrivera/rust,aidancully/rust,sae-bom/rust,jashank/rust,seanrivera/rust,aneeshusa/rust,vhbit/rust,jroesch/rust,ejjeong/rust