[bktools patch] mailsplit: handle tabs in headers

Hello Linus et al, The patch below fixes mailsplit to cope with non-' ' space characters in mail headers. Some people seem to have mail clients that use tabs which would result in mailsplit omitting those headers from its substitutions. -ben -- "Time is what keeps everything

[bktools patch] mailsplit: handle tabs in headers

Hello Linus et al, The patch below fixes mailsplit to cope with non-' ' space characters in mail headers. Some people seem to have mail clients that use tabs which would result in mailsplit omitting those headers from its substitutions. -ben -- Time is what keeps everything