int strv_extend(char ***l, const char *value);
int strv_extendf(char ***l, const char *format, ...) _printf_(2,0);
int strv_push(char ***l, char *value);
+int strv_push_pair(char ***l, char *a, char *b);
int strv_push_prepend(char ***l, char *value);
int strv_consume(char ***l, char *value);
+int strv_consume_pair(char ***l, char *a, char *b);
int strv_consume_prepend(char ***l, char *value);
char **strv_remove(char **l, const char *s);