Modifiers for tag- and macro-declarations

Within <$macro> and <$deftag>, you can use several modifiers to tell hsc how to handle this macro/tag.

Legal modifiers for both <$macro> and <$deftag> are:

/CLOSE (short: /C): macro/tag is a container and requires a corresponding end tag.
/ONLYONCE (short: /1): macro/tag is required at the most once within a document
/REQUIRED (short: /R): macro/tag is required to appear at least once within a document
/RECOMMENDED (short: /RCMD): macro/tag ought to appear least once within a document
/MUST_BE_INSIDE (short: /MBI): Needs a string as argument, that contains a list of container tags, that must be started before tag is allowed to be used.
Example:
The tag <LI> must be used inside some sort of lists only, therefor it's /MBI="ul|ol|dir|menu" is used. The vertical bar (``|'') is used as a separator for multiple tags.
/NOT_ALLOWED_WITHIN (short: /NAW): Like /MBI, but this time tags that must not be used before. For example, a nested usage of <A> is not allowed, therefor /NAW="a" is used.

Additionally, the following modifiers can be used with <$deftag>

/AUTOCLOSE (short: /AC): Used for <P> and <LI>, which can be used as container or single tag depending on the HTML version. Tags marked with this modifier can not be nested.
/JERK (short: /J): tag is only used by jerks
/LAZY (short: /L): This modifier has just been for my laziness and defines some often needed attributes with a single letter; ``c'' for ``CLASS:string'', ``h'' for ``HREF:uri'', ``i'' for ``ID:id'', ``k'' for ``CLEAR:bool'', ``l'' for ``LANG:string'', ``m'' for ``MD:string'', ``s'' for ``SRC:uri'', ``w'' for ``NOWRAP:bool''.
For example, use /LAZY="cil".
/OBSOLETE (short: /O): tag is obsolete and should not be used any more. This eg. concerns <LISTING>.
/SKIPLF (short: /S): skip a linefeed ("\n") that comes immediately after the tag. This is only useful for some of hsc's special tags and only avoids some unnecessary empty lines.
/SPECIAL (short: /SPC): This one marks tags which are no "normal" tags with some attributes, but have their own syntax. The only HTML-tag which has this modifier set is <!> (for SGML comments).
/WHTSPC (short: /W): If this modifier is set, any occurrence of the container is checked for succeeding/preceding white spaces. By default, this concerns the tags <A>, <TITLE>, headings and physical/logical styles.

To define an end macro, don't use /CLOSE, but define the macro a second time, with a "/" as the first character of its name. For examples, see the section about <$macro>.