Remove more Mosquitto versions (1.4.8 and 1.4.4)
```
Sending build context to Docker daemon 10.24 kB
Step 1/7 : FROM alpine:3.4
---> 25fe527f52de
Step 2/7 : MAINTAINER David Audet <[email protected]>
---> Running in bb1c518392ca
---> 8e0c3acc2c08
Removing intermediate container bb1c518392ca
Step 3/7 : LABEL Description "Eclipse Mosquitto MQTT Broker"
---> Running in 4610cfca0b9e
---> 14dcc9a5d673
Removing intermediate container 4610cfca0b9e
Step 4/7 : RUN apk --no-cache add mosquitto=1.4.8-r2 && mkdir -p /mosquitto/config /mosquitto/data /mosquitto/log && cp /etc/mosquitto/mosquitto.conf /mosquitto/config && chown -R mosquitto:mosquitto /mosquitto
---> Running in 35a446310c8c
fetch http://dl-cdn.alpinelinux.org/alpine/v3.4/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.4/community/x86_64/APKINDEX.tar.gz
ERROR: unsatisfiable constraints:
mosquitto-1.4.12-r0:
breaks: world[mosquitto=1.4.8-r2]
Removing intermediate container 35a446310c8c
The command '/bin/sh -c apk --no-cache add mosquitto=1.4.8-r2 && mkdir -p /mosquitto/config /mosquitto/data /mosquitto/log && cp /etc/mosquitto/mosquitto.conf /mosquitto/config && chown -R mosquitto:mosquitto /mosquitto' returned a non-zero code: 1
```
```
Sending build context to Docker daemon 10.24kB
Step 1/7 : FROM alpine:3.3
---> 461b3f7c318a
Step 2/7 : MAINTAINER David Audet <[email protected]>
---> Using cache
---> f05278c09470
Step 3/7 : LABEL Description "Eclipse Mosquitto MQTT Broker"
---> Using cache
---> d4ea5530de3a
Step 4/7 : RUN apk --no-cache add mosquitto=1.4.4-r0 && mkdir -p /mosquitto/config /mosquitto/data /mosquitto/log && cp /etc/mosquitto/mosquitto.conf /mosquitto/config && chown -R mosquitto:mosquitto /mosquitto
---> Running in c851aecffcb9
fetch http://dl-cdn.alpinelinux.org/alpine/v3.3/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.3/community/x86_64/APKINDEX.tar.gz
ERROR: unsatisfiable constraints:
mosquitto-1.4.12-r0:
breaks: world[mosquitto=1.4.4-r0]
Removing intermediate container c851aecffcb9
The command '/bin/sh -c apk --no-cache add mosquitto=1.4.4-r0 && mkdir -p /mosquitto/config /mosquitto/data /mosquitto/log && cp /etc/mosquitto/mosquitto.conf /mosquitto/config && chown -R mosquitto:mosquitto /mosquitto' returned a non-zero code: 1
```
Tianon Gravi