Ports: Improve consistency and quality of ports

- Replaced /Root with
- Improved documentation.
- Removed a few typos.
- Replaced  with
- Added brackets in some cases.

Most of the changes were reviewed and applied manually.

Ports/bzip2/package.sh

@@ -4,12 +4,12 @@ version=1.0.8
 files="https://sourceware.org/pub/bzip2/bzip2-${version}.tar.gz bzip2-${version}.tar.gz 67e051268d0c475ea773822f7500d0e5"
 auth_type=md5
 makeopts=bzip2
-installopts="PREFIX=${SERENITY_BUILD_DIR}/Root/usr/local"
+installopts="PREFIX=${SERENITY_INSTALL_ROOT}/usr/local"
 
 build() {
     run make CC="${CC}" $makeopts bzip2
 }
 
 install() {
-    run make DESTDIR=$DESTDIR CC="${CC}" $installopts install
+    run make DESTDIR=${SERENITY_INSTALL_ROOT} CC="${CC}" $installopts install
 }