[9fans] allowing space (ASCII 0x20) in file names

[G. David Butler gdb@dbSystems.com]

Why is the space (ASCII 0x20) excluded from file names?  This is done
both in /sys/src/9/port/chan.c and /sys/src/fs/port/dentry.c.

/sys/src/fs/port/dentry.c disallows <= 0x20.
/sys/src/9/port/chan.c disallows <= 0x20, '/' (for obvious reasons)
and 0x7f (not so obvious).

Is the idea to disallow unprintables?

I was just looking at IMAP (RFC2060), and it specifies modified
UTF-7 for mailbox names.  The only incompatability is the ASCII
space (0x20).

So, I was wondering, is there a problem allowing the space?

P.S.  I plagiarized the idea for this sig from another, but it is cute.

-------------------------------------------------------------------
G. David Butler   | Who I? Zathras, a Plan9er. Nobody uses Zathras'
                  | system, but Zathras not mind. Zathras used to 
                  | having others ignore Zathras. Besides, Zathras
gdb@dbSystems.com | have best system, so Zathras happy.