* src/getargs.c (longopts): Support `--output'. getopt is now

able to understand that `--out' is OK: the two racing long options
are aliases.
(usage): Adjust.
* src/lex.h (tok_setopt): Remove, replaced with...
(tok_intopt, tok_stropt): these new guys.
* src/lex.c (getopt.h): Not needed.
(token_buffer, unlexed_token_buffer): Not const.
(percent_table): Promote `-' over `_' in directive names.
Active `%name-prefix', `file-prefix', and `output'.
(parse_percent_token): Accept possible arguments to directives.
Promote `-' over `_' in directive names.
* doc/bison.texinfo (Decl Summary): Split the list into
`directives for grammars' and `directives for bison'.
Sort'em.
Add description of `%name-prefix', `file-prefix', and `output'.
Promote `-' over `_' in directive names.
(Bison Options): s/%locactions/%locations/.  Nice Freudian slip.
Simplify the description of `--name-prefix'.
Promote `-' over `_' in directive names.
Promote `--output' over `--output-file'.
Fix the description of `--defines'.
* tests/output.at: Exercise %file-prefix and %output.

doc/bison.info

@@ -31,115 +31,115 @@ instead of in the original English.
 
 Indirect:
 bison.info-1: 1313
-bison.info-2: 50691
-bison.info-3: 100581
-bison.info-4: 150131
-bison.info-5: 197908
+bison.info-2: 50689
+bison.info-3: 100579
+bison.info-4: 147579
+bison.info-5: 197449
 
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 (Indirect)
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-Node: Copying11708
-Node: Concepts30911
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-Node: Semantic Values38930
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-Node: RPN Calc49717
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-Node: Simple Error Recovery67308
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-Node: Ltcalc Rules70836
-Node: Ltcalc Lexer72897
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+Node: Rpcalc Compile63724
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+Node: Location Tracking Calc69195
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+Node: Reduce/Reduce166579
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+Node: VMS Invocation197449
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+Node: Glossary206201
+Node: Copying This Manual212505
+Node: GNU Free Documentation License212714
+Node: Index232579
 
 End Tag Table