When we are not connected and run `/plugins install` we crash because we
get the account struct to check for the (xmpp) tls setting.
To apply that to the http (etc) connection to download the plugin from a
server.
This got introduced in 3a86b8c29 to fix#1624.
There are several ways to handle this (some described in 1880) in this
patch I took the route that it will use secure connection when we are
nto connected and will only check the tls.trust account setting if we
are connected.
Fix https://github.com/profanity-im/profanity/issues/1880
Thanks to @alarixnia fot the patch and bugreport.
```
Forwarding a bug reported using the NetBSD bug tracker ("Profanity crashes at login"): http://gnats.netbsd.org/57050
The code in question here handles messages by people not in the user's contact list, and what is probably happening is that the XMPP server is sending such a message before profanity has set up its window layout.
Setting roster.unsubscribed=false indeed makes profanity start without crashing, and the attached patch bails out early in the problematic code path if layout->subwin is NULL (Adrian verified for me that either of the two makes profanity work for him again). But I am not familiar enough with the profanity code to say if this has any issues.
Profanity compiled with ncurses doesn't crash because ncurses's wattron() has a guard against the user passing null pointers, but the X/Open curses library standard doesn't have this guarantee and there's no guard in the NetBSD curses implementation.
```
Fix https://github.com/profanity-im/profanity/issues/1769
This commit fixes few issues related to OMEMO autodetection:
1. Absence of libsignal-protocol-c doesn't turn OMEMO off, just prints a
notice message. It should (a) set BUILD_OMEMO=false and (b) terminate
with an error on --enable-omemo=yes.
2. Check for gcrypt continues even if libsignal-protocol-c fails. In this
case, LIBS variable can be updated with unneeded -lgcrypt.
3. Similarly to item 2., if libsignal-protocol-c is present, but gcrypt
isn't, variable LIBS is updated with unneeded library.
To resolve the above issues, use intermediate variable OMEMO_LIBS to
accumulate required libraries and set BUILD_OMEMO only when all checks
are passed.
