Add Jerusalem timezone to timezones.tsv (EliasKotlyar#918)

* Add Jerusalem timezone to timezones.tsv

This has been added ata later date. See https://dev.archive.openwrt.org/ticket/11445.html

* Change Jerusalem timezone to change at an earlier offset

uclibc which is used to parse the /etc/TZ file has a problem parsing Israel's DST rule. This is because
the rule employs an offset greater than 24 hours. A mail has been sent to the uclibc mailing list and
an issue has been raised in Dafang-Hacks/Main#30.

As a temporary workaround I changed the rule from 26 to 23, which will cause the clock to change 3
hours earlier when moving to DST.

firmware_mod/www/timezones.tsv

@@ -225,6 +225,7 @@ Asia/Hovd	HOVT-7
 Asia/Irkutsk	IRKT-8IRKST,M3.5.0,M10.5.0/3
 Asia/Jakarta	WIT-7
 Asia/Jayapura	EIT-9
+Asia/Jerusalem	IST-2IDT,M3.4.4/23,M10.5.0
 Asia/Kabul	AFT-4:30
 Asia/Kamchatka	PETT-11PETST,M3.5.0,M10.5.0/3
 Asia/Karachi	PKT-5
@@ -394,4 +395,4 @@ Pacific/Tarawa	GILT-12
 Pacific/Tongatapu	TOT-13
 Pacific/Truk	TRUT-10
 Pacific/Wake	WAKT-12
-Pacific/Wallis	WFT-12
+Pacific/Wallis	WFT-12