Replace local keyword with typeset -l

[siteshwar]

local keyword is available only when ksh is compiled with bash emulation mode. We have disabled it in upstream through att/ast#611, so use typeset -l instead of local in your scripts.

[rocky]

Think I got them all in dfe522b , but double check and reopen if I've missed something. Thanks.

[rocky]

One other thing I should mention. The reason I have typically favored local over typeset -l is because zsh doesn't havetypeset -l, both bash and zsh support local, even though that's not POSIX.