* Fix some seccomp related build errors on certain CentOS and Debian versions.
* Seccomp filter sandbox: missing munmap() -- oops. Did you know that qsort()
opens and maps /proc/meminfo but only for larger item counts?
* Seccomp filter sandbox: deny socket() gracefully for text_userdb_names.
* Fix various NULL crashes with nonsensical config settings. Noted by Tianyin
Xu <tixu@cs.ucsd.edu>.
* Force cast to unsigned char in is* char functions.
* Fix harmless integer issues in strlist.c.
* Started on a (possibly ill-advised?) crusade to compile cleanly with
Wconversion. Decided to suspend the effort half-way through.
* One more seccomp policy fix: mremap (denied).
* Support STOU with no filename, uses a STOU. prefix.
OBS-URL: https://build.opensuse.org/package/show/network/vsftpd?expand=0&rev=45
