which can be slow. To speed things up, all the header conditions are
checked first.
.TP
-\fB1h\fR, \fB8h\fR, \fB24h\fR, \fB48h\fR, \fBweek\fR, \fB2weeks\fR, \fBmonth\fR, \fBtrimester\fR, and \fByear\fR
-select mails received during the last 1, 8, 24, 48, 7 * 24 hours, 14 *
-24 hours, 31 * 24 hours, 92 * 24 hours, and 365 * 24 hours
-respectively.
+\fB1h\fR, \fB8h\fR, \fB24h\fR, \fB48h\fR, \fBweek\fR, \fB2weeks\fR,
+\fBmonth\fR, \fBtrimester\fR, \fBsemester\fR, and \fByear\fR select
+mails received during the last 1, 8, 24, 48, 7 * 24 hours, 14 * 24
+hours, 31 * 24 hours, 92 * 24 hours, 185 * 24 hours, and 365 * 24
+hours respectively.
.TP
\fBtoday\fR
selects mails received since midnight.
{ "week", 0, 24 * 7, -1, -1 },
{ "2weeks", 0, 24 * 14, -1, -1 },
{ "month", 0, 24 * 31, -1, -1 },
+ { "semester", 0, 24 * 185, -1, -1 },
{ "trimester", 0, 24 * 92, -1, -1 },
{ "year", 0, 24 * 365, -1, -1 },