📚 Add section on the library's configuration options, notably the WebStore's new cache

Author: pmonks

README.md

@@ -41,7 +41,7 @@ There are a couple of static classes that help common usage scenarios:
 
 Currently the library offers these configuration options:
 1. `org.spdx.storage.listedlicense.SpdxListedLicenseWebStore.enableCache` - a boolean that enables or disables the WebStore's local cache. Defaults to `false` (the cache is disabled). The cache location is determined as per the [XDG Base Directory Specification](https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html) i.e. `${XDG_CACHE_HOME}/Spdx-Java-Library` or `${HOME}/.cache/Spdx-Java-Library`).
-2. `org.spdx.storage.listedlicense.SpdxListedLicenseWebStore.cacheCheckIntervalSecs` - a long that controls how often each cache entry is rechecked for staleness, in units of seconds. Defaults to 86,400 seconds (24 hours). Set to 0 (zero) to have each cache entry checked every time (note: this will result in a lot more network I/O and negatively impact performance, albeit not as much as not using the cache at all).
+2. `org.spdx.storage.listedlicense.SpdxListedLicenseWebStore.cacheCheckIntervalSecs` - a long that controls how often each cache entry is rechecked for staleness, in units of seconds. Defaults to 86,400 seconds (24 hours). Set to 0 (zero) to have each cache entry checked every time (note: this will result in a lot more network I/O and negatively impact performance, albeit there is still a substantial performance saving vs not using the cache at all).
 
 Note that both of these configuration options can only be modified prior to initialization of Spdx-Java-Library. Once the library is initialized, subsequent changes to either or both of these Java properties will have no effect.