(cherry picked from commit 9497f8a92eed8c75f9c90d459a91ec693939b21f)

Terminate the supervision thread in a controlled manner.

(cherry picked from commit fc937470b68f2e58f87047fbbc1de132ba149f23)

(cherry picked from commit 0fc7efc0f54a4e8ff152d40749e1c25c227f0c99)

(cherry picked from commit 9db43092616ef0030eef353c225dfcbda39ef7fc)

(cherry picked from commit d8d42faca720574c6bc915e7e857a8a8a66d7f58)

(cherry picked from commit 2324d74bbcc0fdb4adbd5245a806b16ccde227a9)

(cherry picked from commit d9b814bae42600f4cf722d635f46c883c31c3525)

(cherry picked from commit ce04ed137f9a70e4a369c22d36fff3f784b2c15b)

(cherry picked from commit 34c97b03c93e0eaffdbb2d9c0aba6a63c9fe7fe8)

(cherry picked from commit 11c32d953159d2ecd34884d64acd7b500b093095)

(cherry picked from commit bf0ba99cd88f4327c3deed026cfd927ce8464bf0)

(cherry picked from commit 1cfa5f2f47ed1289dddbe155c7232e897e5dd91a)

(cherry picked from commit 3c647fc3829441798185ec979420809cc6885f17)

(cherry picked from commit fe3f8ad1fc0e1e666015a3a3732bd18ca9248afd)

(cherry picked from commit face65b9090928c2941d707e1214fc4cb6dd9cd0)

(cherry picked from commit 383b6b5669d1f9f9ee200e5c26a2bccdda1c8c03)

systemd is ... weird. Fallback to using rt_ini -r/s

(cherry picked from commit ab4591042593c551b3cc9fdde997bc76980d0bb8)

waitpid behaviour updated for reload/terminate events

(cherry picked from commit 0e82917c810214f8ed1ca48f757322a8704c2ba1)

.rhosts should not be used nowadays

(cherry picked from commit 605dbe2984b11c02020231b5d45493ce21fca063)

(cherry picked from commit fa961e0c2d715cfd24a3cce0b0af6f603a433690)