Stricter KeyboardInterrupt silencing
Stricter KeyboardInterrupt silencing

Relates to #531, but doesn't solve it completely.

jakubroztocil/httpie,PKRoma/httpie,jkbrzt/httpie,PKRoma/httpie,jakubroztocil/httpie,jakubroztocil/httpie,jkbrzt/httpie,jkbrzt/httpie