Removed unused stream variable
Re-introduced warning-as-error exception (commented). I use the Werror locally
Changed util_abort to dump output to a /tmp file
Changed format for file to use a user-friendly format
Puts dump content to stderr if unable to open the dump file. Simplified output.
Added flag and check for getpwuid, used to add ifdef for pwd.h include and selection of which util_abort to use
Expicitly closing file only in case of actual filesystem file
Merge pull request #153 from flikka/util_abort_tofile

:-)