master
Different compilers and versions of compilers have different warnings. Remove -Werror to give code a greater chance of building.
sort options in manual page; display a better usage.
When system calls indicate an error they return -1, not some arbitrary value < 0. errno is only updated in this case. Change all (most?) callers of syscalls to follow this better, and let's see if this strictness helps us in the future.
reoder letters to fix piles-o'-typos