**    to=UUID          ... to this
**    shortest         ... show only the shortest path
**    uf=FUUID       Show only check-ins that use given file version
**    brbg           Background color from branch name
**    ubg            Background color from user
**    namechng       Show only check-ins that filename changes
**    forks          Show only forks and their children
**    ym=YYYY-MM     Show only events for the given year/month.
**    ymd=YYYY-MM-DD Show only events on the given day
**    datefmt=N      Override the date format
**
** p= and d= can appear individually or together.  If either p= or d=
** appear, then u=, y=, a=, and b= are ignored.
**
** If both a= and b= appear then both upper and lower bounds are honored.
**

  const char *zMark = P("m");        /* Mark this event or an event this time */
  const char *zTagName = P("t");     /* Show events with this tag */
  const char *zBrName = P("r");      /* Show events related to this tag */
  const char *zSearch = P("s");      /* Search string */
  const char *zUses = P("uf");       /* Only show check-ins hold this file */
  const char *zYearMonth = P("ym");  /* Show check-ins for the given YYYY-MM */
  const char *zYearWeek = P("yw");   /* Check-ins for YYYY-WW (week-of-year) */
  const char *zDay = P("ymd");       /* Check-ins for the day YYYY-MM-DD */
  int useDividers = P("nd")==0;      /* Show dividers if "nd" is missing */
  int renameOnly = P("namechng")!=0; /* Show only check-ins that rename files */
  int forkOnly = PB("forks");        /* Show only forks and their children */
  int tagid;                         /* Tag ID */
  int tmFlags = 0;                   /* Timeline flags */
  const char *zThisTag = 0;          /* Suppress links to this tag */
  const char *zThisUser = 0;         /* Suppress links to this user */

      blob_append_sql(&sql, " AND %Q=strftime('%%Y-%%m',event.mtime) ",
                   zYearMonth);
    }
    else if( zYearWeek ){
      blob_append_sql(&sql, " AND %Q=strftime('%%Y-%%W',event.mtime) ",
                   zYearWeek);
    }
    else if( zDay ){
      blob_append_sql(&sql, " AND %Q=strftime('%%Y-%%m-%%d',event.mtime) ",
                   zDay);
    }
    if( tagid ){
      blob_append_sql(&sql,
        " AND (EXISTS(SELECT 1 FROM tagxref"
            " WHERE tagid=%d AND tagtype>0 AND rid=blob.rid)\n", tagid);

      if( zBrName ){
        /* The next two blob_appendf() calls add SQL that causes check-ins that

    db_multi_exec("%s", blob_sql_text(&sql));

    n = db_int(0, "SELECT count(*) FROM timeline WHERE etype!='div' /*scan*/");
    if( zYearMonth ){
      blob_appendf(&desc, "%s events for %h", zEType, zYearMonth);
    }else if( zYearWeek ){
      blob_appendf(&desc, "%s events for year/week %h", zEType, zYearWeek);
    }else if( zDay ){
      blob_appendf(&desc, "%s events occurring on %h", zEType, zDay);
    }else if( zBefore==0 && zCirca==0 && n>=nEntry && nEntry>0 ){
      blob_appendf(&desc, "%d most recent %ss", n, zEType);
    }else{
      blob_appendf(&desc, "%d %ss", n, zEType);
    }
    if( zUses ){
      char *zFilenames = names_of_file(zUses);