'RELENG_6_0_0_RELEASE'.

This commit was manufactured to restore the state of the 6.0-RELEASE image.

context (and only in one place to substitute the .for variable). Therefor
there is no need to pass the context as a parameter.

Patch:	7.197
Submitted by:	Max Okumoto <okumoto@ucsd.edu>

only one variable and Var_Subst() which substitutes all. Split out the
test whether a variable should not be expanded into match_var().
Make access to the input string consistently using str[]. Remove two
unused functions: Var_GetTail() and Var_GetHead().

Patches:	7.184-7.189
Submitted by:	Max Okumoto <okumoto@ucsd.edu>

on every line that starts with a dot use a minimal perfect hash
function and a single strcmp() on the first word after the dot
to find out whether it is really a directive call and, if yes, which
one. Then directly dispatch to a handler function for that directive
(or fall through to the dependency handling code). This makes the
directive parse a little bit more strict about the syntax: the directive
word must be followed by a character that is not alphanumerical and not
an underline (making .undefFOO illegal); .endif and .else can only be
followed by comments.

appropriate.

Patch:		7.147-7.151

Submitted by:	Max Okumoto <okumoto@ucsd.edu>

Remove an unused struct definition.

of a char *.

Patch:		7.49

Submitted by:	Max Okumoto <okumoto@ucsd.edu>

and so get rid of the ForExec helper function by inlining it
into For_Run.

Add a couple of comments.

of empty lines in appropriate places.

Submitted by:	Max Okumoto <okumoto@ucsd.edu>