====== Customizing htaccess ======

Notes on htaccess file (apache web server configuration file)

===== General =====

  * use # for comments (beginning of line only)

===== rewrite mod =====

RewriteRule pattern substitution [flags] 

  * pattern: regex match against url
  * substitution: full url (can be another domain?)
    * a dash (-) means ignored (do nothing)
  * flags: case insensitive, comma-separated, may have args
    * L|last: stop evaluate other rules (if matched)
    * C|chain: chained (subsequent rules) skipped if first not matched
    * E|env: {set (E=VAR:VAL) or unset (E=!VAR) } environment variable 
    * F|forbidden: returns 403 (L implied)
    * N|next: restart ruleset from top (caution: can cause infinite loop!)
    * NC|nocase: case-insensitive rule matching
    * QSA|qsappend: if subs contains query (?), append original (default:discard)

RewriteCond teststring pattern [flags] 
  * if present, must match for the following rule to be aplied
    * teststring: server/env variables, HTTP_HOST, REQUEST_URI, etc.
    * pattern: condition, usually a regex; can use a file attribute test
    * flags: optional, special actions