* mipsread.c (read_mips_symtab, read_the_mips_symtab): Use real

* mipsread.c (read_mips_symtab, read_the_mips_symtab):  Use real
filename with error messages.
* stack.c (frame_select_command):  Rename to select_frame_command
to avoid "fr" and "fra" having nonunique completions.
* symfile.c (sort_symtab_syms):  Ignore sort of zero symtab *.
(symfile_init):  Print file format name when unable to handle it.
(free_named_symtabs):  Use BLOCKVECTOR rather than obsolete BLOCKLIST.
* symmisc.c (free_symtab):  Only free linetable if nonzero.
* symtab.h:  Remove obsolete BLOCKLIST macros.