libpsl: update to version 0.20.1

Builtin PSL data updated to current as of 20180223.

net/libpsl/Portfile

@@ -3,22 +3,18 @@
 PortSystem          1.0
 PortGroup           github 1.0
 
-github.setup        rockdaboot libpsl 0.19.1 libpsl-
-revision            4
+github.setup        rockdaboot libpsl 0.20.1 libpsl-
 license             MIT
 description         A C library and utility to handle the Public Suffix List
 long_description    ${description}
 maintainers         nomaintainer
 categories          net
 platforms           darwin
 
-# Delete this line when updating to the next libpsl version.
-dist_subdir         ${name}/${version}_1
-
 github.tarball_from releases
 set main_distfile   ${distfiles}
 
-set psl_data_commit     7f94647c4317580ec6fe99576c27367cc5ac76fb
+set psl_data_commit     d311456a19a6f212143c926627bf26e15a4a0195
 set psl_data_worksrcdir publicsuffix-list-[string range ${psl_data_commit} 0 6]
 set psl_data_distname   ${psl_data_worksrcdir}
 set psl_data_distfile   ${psl_data_distname}${extract.suffix}
@@ -30,13 +26,13 @@ master_sites        ${github.master_sites}:main \
                     https://github.com/publicsuffix/list/tarball/${psl_data_commit}:list
 
 checksums           ${main_distfile} \
-                    rmd160  a9e5d338db0a58d1de496dfce6f7f4273cf854da \
-                    sha256  735146b51bbd3dcb6b0f87819c64bf3115f7fb9fa2e3a7fe9966e3346a8abc79 \
-                    size    9072973 \
+                    rmd160  b7db7fa46756e0e21f901f4c0ee1563e8fa61bc5 \
+                    sha256  95199613158dd773257ef4feccf1acdf5f791479ab4537bd984ca8598447219f \
+                    size    9078932 \
                     ${psl_data_distfile} \
-                    rmd160  aba990df0520ca53a7fda07cd5d138f8859a0d0d \
-                    sha256  9e16739332f11359c20a828a33372015eb7659d28cabf595a97c790de573b985 \
-                    size    83808
+                    rmd160  76a9448c5da02f2a6c327f5ca09ea6a3fb775af1 \
+                    sha256  f5eb2bc4fdb416db6be885d4fdebe84ec0ff303d877274a692e55ee480908f00 \
+                    size    83986
 
 depends_build-append \
                     port:pkgconfig \