* symfile.c (allocate_symtab): New fn, consolidates the work

* symfile.c (allocate_symtab):  New fn, consolidates the work
of allocating and initializing a new struct symtab.  Set the
language of the symtab based on its filename extension.
* symfile.h:  Declare it.
* mipsread.c (new_symtab):  Use it.  Minor formatting changes.
* dbxread.c (end_symtab):  Use it.

* mipsread.c (parse_symbol, case stParam and stProc):  Add #if 0'd
code for saving types of parameters with each function definition.
* dbxread.c (define_symbol, function and parameter cases):  Ditto.
(read_dbx_symtab, case N_DEFD):  Ignore.
(read_enum_type):  Recognize FALSE/TRUE enum as Modula-2 BOOLEAN
type.
(read_range_type):  Rename MAX_OF_TYPE to MAX_OF_C_TYPE, etc.
#if 0 out its uses, though, since they set a dead value.
* coffread.c (end_symtab):  Use allocate_symtab.
(process_coff_symbol):  #if 0'd for functions and params as above.
(read_enum_type):  Recognize Modula-2 BOOLEAN.