vsftpd 3.0.1 正式版釋出

三大ftpd之一的Vsftpd釋出3.0.1正式版.2012-09-16.上個版本是2012-04-10的3.0.0 .對比proftpd和pure-ftpd，vsftpd的性能最快，安全性也很好。

- 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
<[email protected]>.
- 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.      

chaunceyhao