Remove dependencies on getdelim and getline.
Also, remove update-game-scores's limits on game scores and simplify its file-locking code. * configure.ac (getdelim, getline): Remove. * lib-src/update-game-score.c (struct score_entry): Unify the username and data members to a single user_data member, since they don't need to be changed independently and getdelim and getline aren't helpful. Make the score member char *, not intmax_t, so that scores are not limited to intmax_t. All uses changed. (lose_syserr): A zero errno stands for invalid data in score file. (normalize_integer): New function. (main): Use it. Check for invalid scores. Omit redundant stat check. (read_score): First arg is now a string, not a FILE *. All uses changed. Do not use getdelim or getline; that's way simpler. (read_scores): Read the whole file, and let read_score handle each line. (score_compare): Compare strings representing integers, not integers. (write_scores) [DOS_NT]: Eliminate unnecessary chmod. (lock_file): Simplify locking code, eliminating goto. Check for unlink failure.
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