Re-alphabetize argument processing.

[Not reviewed.]

It seems apparent that the argument letters in arg.c were once in
alphabetical order.  This restores that, fixes some line spacing issues,
and also adds breaks to the default cases as safety backstops.


git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@23816 3a8e244f-b0f2-452b-bcba-4c88e055c3ca
Moved a misplaced break.

[Not reviewed.]

Just noticed this while working on something else.  A "break;" was
misplaced in argument processing, leading to a situation in which if
you gave "-f configfile" we would re-parse "configfile" as if it had
been an option starting with 'h'.


git-svn-id: http://svn.code.sf.net/p/chapel/code/trunk@23817 3a8e244f-b0f2-452b-bcba-4c88e055c3ca