Security-Bootstrapping: bad links

[yoursunny]

Several links in Security-Bootstrapping.md point to ndn-lite repository master branch, and these links are broken due to changes in that branch.
One example is:

ndn-lite-wiki/Security-Bootstrapping.md

Line 26 in 0b9b7fa

The implementations for Android and ndn-lite both follow a pattern of having lower level sign-on related API’s for processing and constructing sign-on protocol related messages (https://github.com/named-data-iot/ndn-lite/blob/master/app-support/bootstrapping/secure-sign-on-files/secure-sign-on/variants/basic/sign-on-basic-client.h, https://github.com/peurpdapeurp/ndn-lite-android-support-library/blob/master/android_library_and_example/ndnlitesupport/src/main/java/NDNLiteSupport/SignOnBasicControllerBLE/secureSignOn/SignOnController.java), as well as higher level sign-on related API’s that couple these lower level API’s with a specific transport (such as BLE) to give the user an easy to use API for doing bootstrapping (https://github.com/named-data-iot/ndn-lite/blob/master/app-support/bootstrapping/secure-sign-on-files/secure-sign-on-nrf-sdk-ble/sign-on-basic-client-nrf-sdk-ble.h, https://github.com/peurpdapeurp/ndn-lite-android-support-library/blob/master/android_library_and_example/ndnlitesupport/src/main/java/NDNLiteSupport/SignOnBasicControllerBLE/secureSignOn/SignOnController.java). Only the higher level sign-on API’s that are coupled with transport should be used by application developers, and they will be described in the following sections.

To solve the problem and prevent it from happening again, link to permalink instead of master branch (pressing Y on any page to obtain permalink).