Bug: icu linking issue in fts plugin

[Martynas Bendorius]

FTS plugin seems not to be linking dynamic libraries correctly:
[root at server ~]# ldd /usr/lib/dovecot/lib20_fts_plugin.so
	linux-vdso.so.1 =>  (0x00007ffd2eb95000)
	libicui18n.so.64 => not found
	libicuuc.so.64 => not found
	libicudata.so.64 => not found
	libc.so.6 => /lib64/libc.so.6 (0x00007f1cb5566000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f1cb5b73000)

ICU is in custom directory /usr/local/icu, it's not set in ld.so.conf, so, the linker would need to get this added automatically (that's how it's handled in PHP, for example):
-Wl,-rpath=/usr/local/icu/lib

Thank you!

--
Best regards,
Martynas Bendorius