Correctly handle multi-values when converting VCards to array

[nickvergessen]

This affects "only" the php API of our implementation, not related to sync or whatever.

Steps

1. Create a contact named "Hello Testing" (with the contacts app)
2. Add 2 cloud ids: admin@nextcloud.com, admin@example.tld
3. Open the share dropdown in the files view and type admin@ into the box

Expected

Two results for federated sharing:

• Hello Testing (at nextcloud.com)
• Hello Testing (at example.tld)

Actual

Only one result for federated sharing (the second cloud id you entered):

• Hello Testing (at example.tld)

@karlitschek requesting backport to 10 and 9, since this is quite heavy. The same happens for emails and addresses (used by calendar) and it also makes the activity app not finding matches when it's not the first cloud id.

@rullzer@MorrisJobke

[mention-bot]

@nickvergessen, thanks for your PR! By analyzing the annotation information on this pull request, we identified @schiessle, @georgehrke and @DeepDiver1975 to be potential reviewers

[karlitschek]

great. backport makes sense 👍

[rullzer]

Nice 👍

[MorrisJobke]

Tested and works 👍

[nickvergessen]

Stable10: #1207
Stable9: #1208